IP65 has good waterproof performance. It provides important positioning for explorers and outdoor enthusiastsMagnetic charging Built-in 250mAh rechargeable battery Magnetic charging portSmart application control and display, enhance your user experienceModular design The BTB interface is reserved at the bottom to connect and replace different sensors. Meet your different application scenarios and needsOnboard 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-S3FN8LoRa chip: SX1262Maximum output power: 211dBmReceiver sensitivity: -135dBmBattery: 3.7v lithium battery power supply interfaceOperating temperature: -20~70Wi-Fi: 802.11 b/g, up to 150MbpsBluetooth: Bluetooth LE: Bluetooth 5, Bluetooth meshTouch switch: button 5V, magnetic suctionCharging: 2P-2.54mmWaterproof level: IP65Operating temperature: -30~65Battery: 250mAh(Due to different batches, the printed words on the product will be different, which does not affect use)specifications: 915mhzMaterial: plasticcolour: As shownPackage Contents:1 x Sensor1 x Charging CableOnly 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.