Home House 4 Volume Wireless Doorbell Chime 2 Plugin Receiver with 1 Transmitter

Home House 4 Volume Wireless Doorbell Chime 2 Plugin Receiver with 1 Transmitter.  
  
Features: 
-Wireless door bell. 
-With alarm function. 
-Waterproof. 
-Stylish look and light touch design. 
-Easy to install. 
-Ultra-low power design, power saving and long-lasting use. 
-52 polyphonic ringtones. 
-4-level optional volume adjustment. 
-900ft maxium wireless range1in the open air. 
-Push buttons max.16.  
 
Specifications: 
Receiver: 
Working Voltage: AC 90~250V; 
Power Consumption: 10mW; 
Sensitivity: -110dbm; 
Volume: 10-110db; 
Working Frequency: 433.92Mhz±280Khz; 
Transmit Power: 0dbm; 
Color:White; 
Quantity:2pcs. 
 
Doorbells: 
Power Consumption: ≤0.01mW; 
Modulation mode:ASK/OOK; 
Battery:12V/23V alkaline battery; 
Working Frequency: 433.92Mhz±280Khz; 
Transmit Power: 0dbm; 
Color:White; 
Quantity:1pcs; 

Package includes: 
2 x Receiver, 
1 x Doorbells, 
1x User Manual, 
1 x Mounting hardware.