Feature:1. Gravity induction switch, the heavy object is pressed on the coaster, the light is on, and the light is off when the heavy object is picked up, which is convenient to use.2. Using 3pcs highquality LED lamp beads, energy saving and environmental protection, high brightness, low light decay, durable and long service life.3. Safe and environmentally friendly, continuous use, powered by three AAA batteries (batteries not include), long standby.4. Using high quality ABS material, ecofriendly, non toxic, safe and durable to use, antidrop and anticollision5. Wide range of applications, suitable for restaurants, bars, nightclubs, clearing bars, coffee shops, hotels and other places.Specification:Item Type: LED CoasterMaterial: ABSColor: BlackSize: Approx.9.5x2.3cm/3.7x0.9in(D x H)Weight: Approx.63g/2.22ozApplication: Luminous cup matBattery: 3 x AAA battery(Not included)Light Color: White lightMode: Always onLED Lights: 3pcs straw hat chipsSwitch Method: Gravity induction press.Package List:1 x LED Coaster(Battery Not Included)Note:1. Please allow 1‑2in error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.