Function Features.
1.Wireless super long distance control
2.High-loudness speaker alarming on site
3.Automatic AC/DC switching
4.Integrate remote doorbell and alarm

Standard package:
one host, two remote controls, one outside power supply, one operation manual, one quality guarantee cardOptional: Infrared detector, Detector transmit each other, Smoke detector, Gas detector

Technology Parameter:
Working voltage of main engine:AC220V/DC9V Static current of main engine:.?10mA Main engine working frequency: 315MHZ-433.92MHZStatic current of remote control: ?0mARemote control working frequency: 315MHZ-433.92MHZ
Packing: Doorbell alarm
Packing Size:30cmX24cmX4.8cm