Glow in The Dark The numbers and hands which have night light function. It asks for absorbing enough light energy during the day. At night it is released in a fluorescent manner so you can see the light at night or in the dark.(The wall clock will glow in the dark for 3-6 hours or so The glow time depends on the light absorbed in the day The brightness of noctilucent gradually decreases and it can t stay at its brightest all the time.Easy to Read Design with large numbers contrast to the black face which makes reading the time easy from any angle. Awesome modern look wall clock perfect for dining rooms living rooms family rooms bedrooms study room kitchen office and meeting room.Silent Sweep Movement -The premium quality of the precise quartz movement guarantee accurate time also the silent sweep ensures a good study and work environment.Simple to Install Hooks included allows easy installation just put a small nail through the plastic hook and it securely hangs on your wall within a few seconds.(1 hook included)Battery Operated - Powered by one AA battery (not included) please use normal carbon battery for the clock don t use alkaline battery and Rechargeable Battery which could cut down the life of the mechanism and affect the accuracy of the time.