Wireless internal sounder                                   
				    
			     
			    
				    
					    RF Transmission
RF Frequency868 MHz
RF Modulation2GFSK
RF Range1.6 km (open area)
General
Operation temperature-10 °C to 55 °C 
Operation humidity10% to 90% (no condensing)
Shell material PC+ABS
Dimension(WxHxD) 88× 88 × 32 mm 
Weight169.5 g 
Color Red LED flash