IP65 waterproof rating provides reliable protection for outdoor enthusiasts and explorers Magnetic charging with built-in 250mAh rechargeable battery Smart app control and display enhance user experience Modular design with BTB interface at the bottom for connecting and replacing different sensors to meet various application needs Onboard SH1.25-2 battery interface with integrated lithium battery management system including charge and discharge management, overcharge protection, battery power detection, and automatic switching between USB and battery power Three-axis acceleration sensor 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: -20C to 70C Wi-Fi: 802.11 b/g, up to 150Mbps Bluetooth: Bluetooth LE 5.0, Bluetooth mesh Touch switch: 5V button with magnetic suction Charging interface: 2P-2.54mm Waterproof level: IP65 Operating temperature range: -30C to 65C Battery capacity: 250mAh Note: Due to different production batches, printed markings on the product may vary slightly, which does not affect functionality Frequency: 915MHz Material: Plastic Color: As shown in picture Package Contents: 1 x Sensor 1 x Charging Cable Note: Other items not included Note: Lighting and display differences may cause slight color variation between image and actual item. Measurement error allowed within +/- 1-3cm