- Signal strength detection. - Low battery alarm. - Temperature measurement. - Frequency hopping function and two-way communication technology ensure communication stability. - Cloud update and automatic recovery from update failure. - Carrier Frequency: 868.0 MHz–868.6 MHz - Communication Distance: Up to 1200 m in an open space, Two-way - Encryption Mode: AES128 - Power Supply: CR123A battery - Battery Life: 5 year - Operating Temperature: –10 °C to +55 °C - Product Dimensions: 100.2mm × 20.8mm × 20.3mm - Temperature Measuring Range: –15 °C to +65 °C - Reed Switch, Non-metal doors, Movement Distance