wireless doorbell NS-2000D

wireless doorbell / NS-2000D ⊕16 music for choice ⊕wax controlling distance 50 meters (no obstacles) . ⊕working voltage : AC 110V to 130V , 220V to 240V power supply . ⊕plug available : two round pins , two flat pins ⊕Frequency : 315/433±0.5MHz ⊕Quiescent current : 70 to 100Ma ⊕Working current : 80 to 110Ma ⊕Low power consumption: <5mW ⊕Volume : ≥70dB For transmitter :Working voltage : 12VQuiescent : current : 0mA20 times a day by calculating, a high quality battery can use for a year) Packing clamshell packaging ./ 60pcs/carton Carton size : 54 x 41 x 32.5 CM N.W: 10.8KG / G.W: 11.8KG