In addition to radio, recent clock radios have other music sources such as iPod, iPhone, and/or audio CD. When the alarm is triggered, it can play a set radio station or the music from a selected music source to awaken the sleeper. These models usually come with a dock for iPod/iPhone that also charges the device while it is docked. They can play FM/AM radio, iPod/iPhone or CD like a typical music player as well (without being triggered by the alarm function). A few popular models offer "nature sounds" like rain, forest, fire, sea, waterfall etc., in place of the buzzer.
In the 13th century, Al-Jazari, an engineer from Mesopotamia (lived 1136–1206) who worked for Artuqid king of Diyar-Bakr, Nasir al-Din, made numerous clocks of all shapes and sizes. A book on his work described 50 mechanical devices in 6 categories, including water clocks. The most reputed clocks included the Elephant, Scribe and Castle clocks, all of which have been successfully reconstructed. As well as telling the time, these grand clocks were symbols of status, grandeur and wealth of the Urtuq State.[citation needed]
It is undesirable to give someone a clock or (depending on the region) other timepiece as a gift. Traditional superstitions regard this as counting the seconds to the recipient's death. Another common interpretation of this is that the phrase "to give a clock" (simplified Chinese: 送钟; traditional Chinese: 送鐘) in Chinese is pronounced "sòng zhōng" in Mandarin, which is a homophone of a phrase for "terminating" or "attending a funeral" (both can be written as 送終 (traditional) or 送终 (simplified)). Cantonese people consider such a gift as a curse.[79]
Most digital computers depend on an internal signal at constant frequency to synchronize processing; this is referred to as a clock signal. (A few research projects are developing CPUs based on asynchronous circuits.) Some equipment, including computers, also maintains time and date for use as required; this is referred to as time-of-day clock, and is distinct from the system clock signal, although possibly based on counting its cycles.
Let's face it: The ring, blare, buzz, or chirp of your alarm clock is probably never going to be your favorite sound. But then again, the angry rumble of your boss, when you show up late for work after oversleeping, is even worse. So make mornings a little easier by choosing an alarm clock that makes your return to reality if not a pleasure, then at least not a pain.
A brushed and polished brass finish gives this metal carriage alarm clock its enduring style. The decorative handle, turned brass button feet, and polished brass-tone columns at the corners add to the clock's stately presence. Beneath a glass crystal, the brushed brass-tone dial features circular, diamond-cut numeral ring, black Roman numerals, black hour and minute hands, and brass second and alarm hands.
An on-trend take on a retro design, this 12" round wall clock brings a splash of color to any space in your home. This budget-friendly accent showcases a circular face bordered by alternating blocks of green, blue, and red hues with black Roman numerals in the center. Its plastic frame ensures that it’s lightweight and easy to hang, while its metallic pierced hands offer subtle shimmer. This piece does not include batteries.
This massive iron wall clock is 49" in diameter and is finished in off-white with an antique nickel outer ring that is moderately distressed and dented for an aged appearance. Black Roman numerals are centered on individual antique off-white panels. Quartz, battery-operated movement requires one AA sized battery. Some assembly is required. One year warranty and Free Shipping.
Antique styling in a two-tone wall clock features a Worn Black finish with red undertones and a contrasting Antique Red inset panel. Beneath a convex glass crystal, the dial features an Antique Red background with gold Arabic numerals and aged brass-tone spade hands. The wood stick pendulum features a spun brass-finished bob. Finished in Worn Black on select materials, hardwoods and veneers. Quartz, non-chiming battery operated movement.

Place Sense by Hello on your bedside table, and it will help you fall asleep, stay asleep, and wake up without the grogginess or fatigue you may be used to. The small, white orb plays ambient noises to help ease you into dreamland, and a small monitor clipped to your pillow tracks your movements throughout the night, and sends feedback to an app on your smartphone. By monitoring your sleep cycles, the alarm knows the best time to wake you up in the morning so you're feeling refreshed.

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.
Add a dash of visual intrigue and stylish sophistication to your ensemble with this eye-catching wall clock, the perfect piece for your well-curated aesthetic. Hang it up on a deep blue or charcoal-toned wall in the living room to complement its shimmering silver finish and hard-lined metal design, then offset its striking starburst silhouette by arranging a console table below with glossy ceramic vases and simple metal picture frames. Curating a midcentury-modern aesthetic in your space? Lean...
About 1450, clockmakers working probably in southern Germany or northern Italy began to make small clocks driven by a spring. These were the first portable timepieces, representing an important landmark in horology. The time-telling dials of these clocks usually had an hour hand only (minute hands did not generally appear until the 1650s) and were exposed to the air; there was normally no form of cover such as a glass until the 17th century, though the mechanism was enclosed, and the cases were made of brass.
The Howard Miller Postema Oversized 49" Wall Clock is a unique piece that will remind you of oversized clocks. This round-shaped clock is a piece of style with the traditional accents. The clock has an espresso finish and round shape. You can mount this clock in any room at your home. This clock can also be placed in big halls or entryways because of its size and functionality. The clock has a distressed finish that complements the espresso varnish. This antique wall clock is made from wrought...
For light sleepers, audio alarms can be rather jarring. Fortunately, the Philips Morning Wake-Up Light uses a warm, gentle glow and natural sound effects rather than incessant beeping to get you out of bed. The alarm clock also features a colored sunrise simulation and 20 brightness settings for optimal customization. The light slowly increases in brightness between 20 and 40 minutes prior to your desired alarm time. The clock helps you drift to sleep, too. Instead of you simply turning out the lights and settling into bed, the light-responsive dimming feature gently guides you to sleep with audio accompaniment. This type of alarm is definitely not for everyone, but it is suitable for those who prefer to wake up gradually. For more details, read our full Philips Wake-Up Light review.

A: There’s always going to be a sleep-related study going on, but you might be surprised to find that it’s not a one-size-fits-all answer. There’s about 1% of the population, known as The Sleepless Elite, who don’t need to clock-in a bunch of hours with their pillows. Some of us just run better off of less sleep, even if we don’t realize it right away. There’s such a thing as oversleeping, too, so how do you really know your specific sleep needs?
If the four alarms you scheduled to go off 10 minutes apart wake your neighbors but not you, you might want to try this noisy clock; it has a 113-decibel alarm—about as loud as a jackhammer. And if the volume alone won't do it, the red flashing lights and accompanying bed-shaker unit (which goes beneath your mattress) should deliver the full sensory message that grave danger awaits unless you get out of bed.

Clocks have different ways of displaying time, connected to their internal clockwork type. Analog clocks usually indicate time using angles. Digital clocks display a numeric representation of time. Two numeric display formats are commonly used on digital clocks: 24-hour notation and 12-hour notation. Most digital clocks use electronic mechanisms and LCD, LED, or VFD displays. For convenience, distance, telephony or blindness, auditory clocks present the time as sounds. There are also clocks for the blind that have displays that can be read by using the sense of touch. Some of these are similar to normal analog displays, but are constructed so the hands can be felt without damaging them. The evolution of the technology of clocks continues today. The study of timekeeping is known as horology.
"Love it...Love it....Just a basic alarm clock needed one to check that my FM transmitter is on the correct frequency one that had a digital tuner fits the bill just fine and a battery back up clock for time announcements ....What can I say, it's a quality alarm, that never fails, and is not expensive Not once has this alarm failed to wake me up, Digits are bright and easy to see If I were to say something negative, The time is a little too fast (in a month you'll notice your like a minute or two ahead of the actual time, easy fix though) And the radio connection needs to better"
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