Wireless Doorbell Kit Smart Doorbell Outdoor Waterproof Touch Button Long Transmission Home Security Door Bell

Product Name: M525 doorbell receiver; 
Working Voltage: AC100-240V; 
Dimension: 59*18*93mm; 
Wireless distance：150meters( open area ); 
Working Temperature: ( -10℃ to 50℃ ); 
Multi function: doorbell /welcome/alarm; 
 
Product Name: F51 doorbell button; 
Working Voltage: 1 pcs* CR2052 button battery ( Not Included ); 
Dimension: 33mm*15mm*68mm; 
Wireless distance：150meters( open area ); 
Working Temperature: ( -10℃ to 50℃ ); 
Multi function: Doorbell /Welcome/Alarm; 

Package Includes: 
1 * Doorbell Receiver; 
1 * Doorbell Button;