Place the night coaster next to your bed and the sound activated LEDs in the rim will light up for ten seconds at a time whenever you whistle, clap, speak or snap you fingers alerting you to the coaster making it easy to locate in the middle of the night. Ideal for placing your hands immediately on drinks, your phone or any other must have item in the night, the LED night coaster allows you to put your hands on must have objects without disturbing others in your room. Battery powered, place these handy coasters anywhere in your home to give a touch of light where it would otherwise be dark, and they\'re great for travel and camping too! Sound activated LED drinks coasterWhite LEDsLEDs light up for 10 seconds at a timeReact to clapping, whistling, talking and finger snappingLocate items without disturbing others in the dark20ft maximum audible sensitivity Ideal for use around your home, for camping and travelBattery operated; requires 2 x AA batteries (not included)Size: 12.5cm diameter x 2.5cm depth