Nrf52810 Bluetooth 5.0 Low Power Consumption Module Beacon Indoor Positioning Black, 41.5 X 31.5 X f74 This product has the advantages of ultra-low power consumption, stable Bluetooth performance, small size and waterproof sealing. APP: Holyiot-beacon Bluetooth version: Bluetooth 5.0 Battery model: CR2032 (not included) Supply voltage: 2.2-3.6V Waterproof grade: IP66 Colour:black Material:ABS Size:41.5x31.5x10mm Package Contents: 1 x Bluetooth beacon Only the above package content, other products are not included. Note: Light reflection 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. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.