* Type: Doorbells . * Place of Origin: Zhejiang, China (Mainland) . * Power Source: Battery, Plug . * Doorbell Type: Wireless . * Radio Frequency: 315MHz/433MHz . * Operating current: =120mA . * power supply: receiver:DC 2*1.5v AA battery, transmitter: 12V 23A battery . * appliance range: home,hotel,office,apartment,shop,garage,and others . * material: ABS plastic . * sound: 32 melodies . * range: 100m . * Working power consumption: =5W . * Active pressure wave(receiver): =-57dbm . * Negative pressure wave(button): =-36dbm . Fetchers: 1. Wireless Doorbell 1 switch RC and 1 bell alarm . 2. Wireless easy mounting design never affects your inner decoration and makes the doorbell anywhere you like . 3. 32 Melody Music choices . 4. Intelligent flashlight design brings convenience to the hearing handicapped . 5. All-day anti-interference system - prevents the doorbell from interferences outside or between neighbors . 6. Easy to install with double-side sticker at the back of the remote control . 7. For receiver: Powered by 2 pieces of 1.50V AA batteries to be placed in the slot of the receiver (not included) . 8. For remote control: Powered by 1 piece of 12V 23A battery (Included) . 9. 150m operating range . 10. Low power consumption . 11. With CE certificate . 12. Suitable for house, office, shops, hotel, tire building and factory, etc.