【 Wide & Easy to Read from Away】: 22 inches in diameter. Large size allows everyone to see this stylish watch from the distance 【Silent Clock Movement Movement】: At night the sound of clicking gives you a sweet dream all night. 1 x AA battery for operation, not included (Update: Both Alkaline and Carbon Zinc batteries are compatible for movement) 【Easy Installation】:No Drilling and Tools Required. Find a place for the wall hook, then follow the included installation guide to allow consumers to open and follow the pre-cut patterns to Peel & Stick Clock Markers (12 pieces) on the wall. It's just that simple and easy 【Innovative Design Structure - Good Design Award】: 3M VHB Heavy Duty tape and magnetic wall hook allow consumers to avoid piercing the wall and hold the clock firmly on the wall. Reliable magnet keeps the clock's center module firmly connected to the wall hook and makes it easy to remove in one second for battery change 【Glow in the Dark / Creative and Stylish】: This award-winning clock will glow in the dark and bring your wall to life. A fun and easy way to add a modern wall clock to any clockmaking project. The center module can be used separately to customize your own wall clock on its own, and is suitable for quartz clock repair or replacement FEATURES: Product Name: PresenTime & Co 2nd Gen DIY Clock - Night Glow; Material: Aluminium & ABS Plastic; Movement: Sweep Quartz Movement; Size: 22 inch (56 cm); Power: 1 AA battery for operation, not included