Features ultra-low power consumption, stable Bluetooth BLE, battery, and convenient parameter configuration. With the "Holyiot-beacon" app, it is convenient for customers to test and adjust advertising parameters. Can meet different needs under various environmental conditions. Product: HOLYIOT-21053 Bluetooth version: BLE 5.0 Chip: nRF52810 Configuration app: Holyiot-beacon Battery type: Lithium battery Supply voltage: 2.2–3.6V Transmission distance: 50m Size: 68 x 25mm Button: Yes Weight with battery: 48g Weight without battery: 31g Installation method: Adhesive Electrical characteristics: Quiescent current: 3μA Operating current: 8.0mA Average current: 54μA (+4dB, 500ms, all sensors enabled) Battery capacity: 2700 mAh Battery life: 4000 days (0dB, 1s interval) Working temperature: -40°C to 80°C Color: White Material: Plastic Dimensions: 59 x 41.8 x 15.5mm Package contents: 1 x nRF52810 Bluetooth beacon Note: Light reflection and different displays may cause the color of the item in the picture to vary slightly from the actual product. Measurement allows an error of +/- 1–3cm.