IP65 has good waterproof performance. It provides important positioning for explorers and outdoor enthusiasts Magnetic charging Built-in 250mAh rechargeable battery Magnetic charging port Smart application control and display, enhance your user experience Modular design The BTB interface is reserved at the bottom to connect and replace different sensors. Meet your different application scenarios and needs Onboard SH1.25-2 battery interface, integrated lithium battery management system (charge and discharge management, overcharge protection, battery power detection, USB/battery power automatic switching) Main control chip: ESP32-S3FN8 LoRa chip: SX1262 Maximum output power: 211dBm Receiver sensitivity: -135dBm Battery: 3.7v lithium battery power supply interface Operating temperature: -20~70 Wi-Fi: 802.11 b/g, up to 150Mbps Bluetooth: Bluetooth LE: Bluetooth 5, Bluetooth mesh Touch switch: button 5V, magnetic suction Charging: 2P-2.54mm Waterproof level: IP65 Operating temperature: -30~65 Battery: 250mAh (Due to different batches, the printed words on the product be different, which does not affect use) specifications: 915mhz Material: plastic colour: As shown Package Contents: 1 x Sensor 1 x Charging Cable 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.