This product has the advantages of ultra-low power consumption, stable Bluetooth performance, small size and waterproof sealing.Companion APP: Holyiot-beaconBluetooth version: Bluetooth 5.0Battery model: CR2032 (not included)Supply voltage: 2.2-3.6VColour:Random Color(The specified color is not accepted)Material:Plastic + MetalSize:30 x 8.4mmPackage Contents:1 * Bluetooth beaconOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.