Baby Sensor Sense-U Baby Monitor 3 (with base station) Compatible OS: iOS 9.0 or later, Android 6.0 or later Communication Range: Less than 15m Communication: BLE 2.4GHz, WiFi (5G not supported) Battery Life: Up to one month (CR2032) Sensors: Body movement sensor, temperature sensor, humidity sensor Set Contents ・Baby sensor ・Replacement sensor part ・Chip for battery replacement ・Base station ・Base station power cord ・User manual ・Tape to reduce skin irritation Used for about 5 months. There are scratches on the surface of the sensor. Otherwise, there is no noticeable dirt or damage, and it can be used without any problems.