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The Wave Ceptor series (stylized as WAVE CEPTOR or WaveCeptor) is a line of radio-controlled watches by Casio. Wave Ceptor watches synchronise with radio time signals broadcast by various government time services around the world. These signals transmit the time measured by atomic clocks accurate to one second in millions of years. By synchronizing daily with the signals, the Wave Ceptor watches achieve high accuracy, using a quartz crystal to keep time in the interim. Some radio watches, including some Wave Ceptors, are solar-powered, supported by a rechargeable battery. The watch displays may be fully digital, analog, or analog-digital. Hybrid Wave Ceptor models support GPS satellite reception of both time and location, in addition to broadcast signals.

Radio-controlled watches require no setting of time and date, or daylight saving time adjustments, as they attempt automatic synchronization several times every night. Without synchronisation, Wave Ceptors, like other commercial quartz timepieces, are typically accurate to ± 15 seconds per month; daily synchronization ensures 500 ms accuracy.

Most Wave Ceptor watches have a signal strength indicator which shows if the time signal is strong enough to correct the time set. The number of transmitters to which the watches can tune vary according to watch model; most watches can tune to any one of several time signal broadcasts around the world. In Europe, the stated reception range is approximately 1,500 kilometres.

Later Casio radio-controlled watches are branded as the basic Wave Ceptor and more expensive Lineage and Oceanus lines. More recent watches that connect to a smartphone with Bluetooth get Internet time from the phone, without requiring long-distance radio reception.

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Casio Wave Ceptor

iRobot Roomba S9

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