Battery Life: 6 months or better at -20C. Compatibility:Supported Android 4.3+ system Certification:CE FCC RoHS Battery: CR2025 coin or larger. Physical size must be less than 2.54cm X 2.54cm x 1.27cm; Standard:Bluetooth 4.0 (BLE) Configurable:UUID, Major, Minor etc. Distance:100 meters in the open space Module:nrf51822 module Show More