Number of buttons
			
3
		
		
			
Dimension
			
W54 x L54 x H11mm
		
		
			
Net Weight
			
20g
		
		
			
Color
			
Black
		
		
			
Frequency Range
			
FM 433MHz
		
		
			
Power Source
			
DC 3V coin battery (CR2025)
		
		
			
Battery Life
			
Approx. calling 40,000 times
		
		
			
Antenna Type
			
PCB pattern antenna