“The energy for the product is provided by a special long-life battery recharged by integrated solar cells, thus cancelling the need for a cable or replacing of batteries. The clock is completely self-sustaining and maintenance-free – it is also completely silent, with nary a solar-powered tick or tock to be heard.
According to the company, the clock also features a centrally broadcasted radio signal automatically that sets the time every hour, so a manual time adjustment is never needed. It also includes an integrated smoke sensor that activates an alarm sound in case of fire. The clock comes in either a silver-white or silver-black casing”….. Via <AER Online> Also See <Supplier Site>