The wireless door bell adopts fashionable design and technology, melodies function and large effective range, easy to install and use, is a good choice for your house, villa, office, nursing room, etc.

 
Features:

Work Voltage:AC 80V-250V                    

use transformer to instead of  capacitor

Work Frequency: 315MHz/433MHz
 
Battery free transmitter, eco product   
 
Transmitter: 42x75 mm

Receiver:96x60 mm
 
Transmitter Power :< 10mW                 
 
Adjustable Volume(4 levels), 25-85dB
 
IPX7 waterproof  button                            
 
Learning coding function
 
36 high quality melodies
 
280 meters remote distance
 
Button can be pressed more than 100, 000 times
 
Different plugs standards (Euro/US/UK etc.)
 
CE, RoHS ,FCC available

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Receiver Standby: <1mA

Transmitter battery type: 23A 12V (1 PC, alkaline, standby lifespan: 15 months)