Easy to Read: Diameter in 30cm, Large 3D Arabic numerals make it easy to see from any corner of your room Silent Wall Clock: Silent quartz sweep clock motor with continuous movement ensures a Accurate timekeeping and an absolutely silent working or sleeping environment Classic and simple design: The surface of the wall clock is made of high quality 4mm thick tempered glass. Beautiful HD patterns give this wall clock a literally timeless look. Perfect for bedroom, school, office, living room, kitchen or commercial applications Battery Operated Wall Clock : Requires a single AA battery (not included). For longer life, please use regular carbon batteries instead of high performance alkaline batteries Easy to Use: The watch simply hooks onto the keyhole slot on a nail, screw or hook and the slot attaches to the motor on the back of the watch