1. Power mode: AC
2. Power supply voltage: 110/220 (V)
3. Ringtones: 36 songs
4. Power consumption: 1 (W)
5. Scope of application: 300 meters
6. Size: transmitter: 80x45x22mm; receiver: 90x62x28mm
7. Scope of application: family commercial residential area, office building, hospital, factory, restaurant
8. Battery: 12V3A battery