dingdong bell / NS-998C

dingdong bell / NS-998C Battery operated doorbell For receiver : ⊕one music (ding dong ) ⊕wax controlling distance 50 meters (no obstacles) . ⊕working voltage: DC power supply . ⊕Frequency : 315/433±0.5MHz ⊕Quiescent current : 0mA ⊕3 x 1.5V AA alkaline battery ⊕Volume : ≥70dB For transmitter :⊕Working voltage : 12V/23A alkaline battery⊕Quiescent : current : 0mA⊕20 times a day by calculating, a high quality battery can use for a year) Packing clamshell packaging , 60pcs/carton Carton size : 59 x 30 x 31 CM