A woman sleeps peacefully before being awakened by her alarm clock
Many projection alarm clocks (clocks that display the time on a wall or ceiling) use radio-controlled time to provide accurate timekeeping combined with additional features like indoor and outdoor thermometers, as well as humidity indicators. Learning to program and use a projection alarm clock is simple and fast, leaving you more time to catch a few extra minutes of shuteye.
Projection alarm clocks that use radio-controlled time, as well as models that include a temperature and humidity feature, require that users perform a brief set-up to ensure the alarm clock is communicating with the remote sensor device. This set-up procedure requires that both devices be placed a couple of feet from each other and then turned on. The units should then be left untouched for at least 15 minutes while they learn to communicate with each other. The sensor will receive a radio time signal and program the clock with the correct time.
Positioning the Projection Beam
Most projection alarm clocks allow users to position the projection beam to their liking. Some models let you position the beam by aiming a movable projection arm. Other models let you choose the beam's position using a four-directional key or button. Regardless of which type of projection alarm clock model you own, position it at least 18 inches but no more than 12 feet from the surface you want the time projected on to ensure that the display is clear and legible.
Care and maintenance for your projection alarm clock includes keeping both the remote temperature sensor and projection alarm clock out of extreme temperatures and away from strong vibrations. The remote temperature sensor and projection alarm clock should be kept clean and wiped with a soft damp cloth when dirty. The units are not waterproof and should not be immersed in water or exposed to rain.
Should your projection alarm clock need repair, contact the manufacturer's repair service.
Many projection alarm clock models give users the option of powering their devices with an AC adaptor or batteries. If you decide to power your projection alarm with batteries, most projection alarm manufacturers recommend using alkaline, rather than rechargeable batteries. Low-powered batteries should be removed from these units immediately to avoid leakage and replaced with new batteries.