The Bulova C4837 round shaped Music Streamer wall clock is made from metal and is powered by 1 x AA battery (not included). It has a brushed silver tone finish with a black chapter ring, silver hands, and silver Arabic numerals. This clock has a protective glass lens and quiet sweeping seconds hand and also houses a Bluetooth wireless speaker system. It wirelessly supports any type of programming from a smartphone or tablet and transmits up to 32 feet away, working easily with Android and iOS software. Built-in Li-Polymer rechargeable battery can be removed and charged via the included USB cable and universal wall charger. Power output: 2X3 watt RMS. Height: 16 inches / 41cm Width: 16 inches / 41cm Depth: 3.5 inches / 8.7cm