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