This is the number-one selling kid's clock on Amazon, with more than 2,500 reviews. Parents rave about the restoration of their sleep time. Many parents say it "saved me from my early riser! Life changing!" Even parents of older children with developmental delays found the clock very useful in indicating to non-readers when it's okay to get up, and when it's not.
Stay on schedule and charge a range of devices with this innovative iHome dual-alarm clock. Place your compatible smartphone on top of the Qi-certified device for swift wireless charging, or plug your phone into the clock’s handy powered USB port. This iHome dual-alarm clock incorporates NFC technology, so you can connect an array of Bluetooth-enabled devices with a quick touch.

More than just a tool for keeping track of the time, this eye-catching wall clock helps turn any empty wall into an artful display. Crafted from injection plastic finished in a sleek metallic tone, it features a circular center with rods all around extending to stage the numbers of an analog dial. Measuring 16'' in diameter, it makes a statement on your kitchen or entryway wall without dominating the decor.
To see if ShippingPass is right for you, try a 30-day free trial. Also, with ShippingPass, there is no need to worry about commitment. If you decide you want to discontinue the service, you can cancel your subscription at any time. No matter what your shipping needs, Walmart's got you covered. Sign up for ShippingPass so you can shop more, save money and live better.

Sounds pretty self explanatory, right? You have to get up, position two thumbs on the bottom of the screen, and turn around according to the predesignated amount of spins. You’ll actually have to jerk yourself around, and by the end of it, you’ll look at the bed and say, “Well, I’m already up.” At least, that’s the hope of the app developers. This one comes in handy if paired with louder alarm clocks, as well.
This color-changing option features a radio, built-in wake-up tones, Bluetooth music streaming (so you can wake up to your favorite playlist), and USB-charging capacity to keep your phone juiced. You can preset two alarms, cycle through colors, and snooze, and even use the alarm clock's speakerphone and microphone functions to answer phone calls from paired devices. Basically, this clock does everything except your laundry.

The Electrohome Projection Alarm Clock is the second-best selling alarm clock on Amazon, with more than 9,700 reviews. Many buyers praised the projection feature, and particularly liked the fact that the brightness of the blue LCD display can be adjusted; for some owners, the clock's light is just a little too intense. The ability to set one alarm time for Monday through Friday, and a separate time for the weekend was another popular feature.


Now, RCA Digital Alarm Clock is pretty basic, but for some of us, that’s all we need, right? With a bright, beaming red LED display, you’re certain to rub your eyes and wonder what weird light is pulsating from your nightstand. There’s an alarm indicator and the classic AM/PM light that we all remember from early-2000 models. You can do something different from your late 1990s-inspired clock, and that is change the brightness levels so you don’t completely burn out your retinas.
The primary purpose of a clock is to display the time. Clocks may also have the facility to make a loud alert signal at a specified time, typically to waken a sleeper at a preset time; they are referred to as alarm clocks. The alarm may start at a low volume and become louder, or have the facility to be switched off for a few minutes then resume. Alarm clocks with visible indicators are sometimes used to indicate to children too young to read the time that the time for sleep has finished; they are sometimes called training clocks.
This Extra Large wall clock is 42 inch in diameter. This oversized retro gallery wall clock is an adaptation of a classic 1940s George Nelson design. The center is finished in brushed nickel and is surrounded by 12 screw on black satin balls on screw on nickel finished rods. Black satin finished hour and minute hands. Quartz, battery operated movement. Finished in Brushed Nickel Finished with Satin Black Movement: Quartz, Battery-operated Movement uses one AA battery. One year warranty and free shipping.
Certainly not just for telling time, wall clocks are perfect for adding artful appeal to your kitchen wall or acting as a focal point above the living room mantel. Take this one for example: a true traditional, its Roman numeral dial is accented by a world map detailing the face. Crafted from plastic, its frame offers more of a metal-inspired look with molded trim and a bronze finish. Requires one AA battery.
The next development in accuracy occurred after 1656 with the invention of the pendulum clock. Galileo had the idea to use a swinging bob to regulate the motion of a time-telling device earlier in the 17th century. Christiaan Huygens, however, is usually credited as the inventor. He determined the mathematical formula that related pendulum length to time (about 99.4 cm or 39.1 inches for the one second movement) and had the first pendulum-driven clock made. The first model clock was built in 1657 in the Hague, but it was in England that the idea was taken up.[38] The longcase clock (also known as the grandfather clock) was created to house the pendulum and works by the English clockmaker William Clement in 1670 or 1671. It was also at this time that clock cases began to be made of wood and clock faces to utilize enamel as well as hand-painted ceramics.
Keep track of time and exude antiqued style with this bold 24-inch oversized wall clock. Crafted from metal and wood, this round analog clock operates on quartz crystal movement and is embellished with a white background and black needles. Roman numerals lend a traditional touch, and small geometric details add extra dimension to the piece. Use this piece to help create a chic French countryside aesthetic in your kitchen. Start by painting the walls a light gray or beige tone with white trim....
Exuding vintage appeal, this striking oversize wall clock rounds out rustic ensembles or lends a timeworn touch to modern spaces. Encased in wrought iron, this design features a wood face bearing distressed details and roman numerals tied together by spade-style hands. One AA battery (not included) keeps this design keeping time. Measuring 32'' W x 32'' H x 1'' D, it's sure to grab glances no matter where it's placed.
Showcasing the time, date, and weather, this clock is an essential for any desk. No need to lift your arm and look at your watch or light up your phone screen, this 0.3'' H x 3.7'' W x 1.5'' D design is an easy way to get the info you need. A vibrant blue backlight keeps it illuminated (requiring the power of a AA battery), while a plastic frame allows it to stand upright.
This Technology Curved Tabletop Clock and weather instrument offers curve-appeal. It also offers dynamic white LED display with a mirrored lens which can be seen from across the room and in darkened rooms. Features dual alarms with adjustable settings: HI/LO sound volume, programmable alarm days, snooze duration (5-60 mins), and auto-dim. Displays your current indoor temperature (F only) and humidity and can charge a mobile device with a bonus USB port in the back of the clock. Table standing...
The Howard Miller Brohman 625-618 Large Wall Clock has a brushed, warm brown finish and metallic undertones. At 34" in diameter with a 22" aged dial this clock will fit just about any decor. With large Roman numerals and black hands this clock will be a favorite for years to come. Highly accurate quartz movement requires one AA battery (Not Included).
Howard Miller 625-323 Alton wall clock. Matte black case with shatter-resistant acrylic crystal. White dial and large, easy-to-read black Arabic numerals. Auto Daylight-Savings movement automatically adjusts for Daylight Savings Time. The hands of the clock follow an LCD display on the back of the clock and make corrections to keep the correct time including Daylight Saving Time corrections.
Now, RCA Digital Alarm Clock is pretty basic, but for some of us, that’s all we need, right? With a bright, beaming red LED display, you’re certain to rub your eyes and wonder what weird light is pulsating from your nightstand. There’s an alarm indicator and the classic AM/PM light that we all remember from early-2000 models. You can do something different from your late 1990s-inspired clock, and that is change the brightness levels so you don’t completely burn out your retinas.
This colorful tabletop clock is the perfect addition for any desk, table, or shelf! Crafted of plastic in a rich red finish, this clock showcases a round case with a silver bezel on a rectangular pedestal base measuring 5.5" H x 5.5" W x 2" D overall. The easy-to-read dial features black Arabic numerals over an off-white face, while a battery-operated movement keeps Art Deco-inspired hour, minute, and second hands in time. Rounding out the design, a programmable alarm gets you up in the morning.
As of the 2010s, atomic clocks are the most accurate clocks in existence. They are considerably more accurate than quartz clocks as they can be accurate to within a few seconds over thousands of years.[54] Atomic clocks were first theorized by Lord Kelvin in 1879.[55] In the 1930s the development of Magnetic resonance created practical method for doing this.[56] A prototype ammonia maser device was built in 1949 at the U.S. National Bureau of Standards (NBS, now NIST). Although it was less accurate than existing quartz clocks, it served to demonstrate the concept.[57][58][59] The first accurate atomic clock, a caesium standard based on a certain transition of the caesium-133 atom, was built by Louis Essen in 1955 at the National Physical Laboratory in the UK.[60] Calibration of the caesium standard atomic clock was carried out by the use of the astronomical time scale ephemeris time (ET).[61] As of 2013, the most stable atomic clocks are ytterbium clocks, which are stable to within less than two parts in 1 quintillion (2×10−18).[62]

In atomic clocks the controller is an evacuated microwave cavity attached to a microwave oscillator controlled by a microprocessor. A thin gas of caesium atoms is released into the cavity where they are exposed to microwaves. A laser measures how many atoms have absorbed the microwaves, and an electronic feedback control system called a phase-locked loop tunes the microwave oscillator until it is at the frequency that causes the atoms to vibrate and absorb the microwaves. Then the microwave signal is divided by digital counters to become the clock signal.[72]


The Howard Miller Braxton 625-628 Wall Clock is finished in Black Coffee on select hardwoods and veneers. The white dial features black Arabic numerals and minute track. The polished silver-tone bezel matches the brushed silver finished pendulum bob. The wooden pendulum stick matches the color of the case. The single chime quartz movement plays the Westminster chime on the hour and gives an hour count. One Year Warranty and Free Shipping.
The invention of the mechanical clock in the 13th century initiated a change in timekeeping methods from continuous processes, such as the motion of the gnomon's shadow on a sundial or the flow of liquid in a water clock, to periodic oscillatory processes, such as the swing of a pendulum or the vibration of a quartz crystal,[3][63] which had the potential for more accuracy. All modern clocks use oscillation.
This farmhouse wall clock measures 30 in. across This farmhouse wall clock measures 30 in. across the face and features horizontal cedar wood slats a white distressed finish hand painted black Roman numerals in a Poster Condensed font and an inner accent ring with individual hour marks. It includes a high torque quartz movement antique-style spade hands and ...  More + Product Details Close
You also need an alarm clock when you have a job or you're in school. It's important for you to wake up on time and avoid being tardy. Arriving late to work is an offense that could get you fired from your job, especially if happens more than once. Missing class because you slept in will also slow your educational progress and waste your money. When you put your alarm clock on your dresser instead of putting it right by your bed, you'll have to get up to turn it off, which helps you get going for the day.

Who doesn't love an alarm clock that verbally lets you know it's time to get up and start your day? Step aside, Siri, because "Reminder Rosie" is where it's at. You can easily record up to 25 different alarm-reminders at 6 seconds each. So why not wake up to a recording of your kids saying, "Good morning, Mom!"? (Or maybe you don't want that.) We love how you can turn off the alarm by quickly pressing a button or just saying out loud, "Reminder Off." 
Simple clocks intended mainly for notification were installed in towers, and did not always require faces or hands. They would have announced the canonical hours or intervals between set times of prayer. Canonical hours varied in length as the times of sunrise and sunset shifted. The more sophisticated astronomical clocks would have had moving dials or hands, and would have shown the time in various time systems, including Italian hours, canonical hours, and time as measured by astronomers at the time. Both styles of clock started acquiring extravagant features such as automata.

“Great little dual alarm clock. Super easy to set the two alarms. Easy to use. It has a night light feature with adjustable dimmer, which is great. You can adjust the display completely dark so you don’t see the numbers. Then you can just hit the snooze button when the alarm is not ringing and the display lights up. It’s powered only by 3 AA batteries: no electric cord, no USB, nothing that you need. If you need a fancy alarm clock that sprays water in your face, this is not it.”
×