Finejo Wireless Door Bell Doorbell Remote Control Chime 32 No wiring required Door Bell powered by 2 AAA batteries ( not included ) Package Content: 1 x Doorbell Receiver 1 x Remote Control 1 x 12V 23A battery Size ( Doorbell Receiver ) : 3.72 x2.16x0.98 inches Size ( Remote Control ) : 0.20 x 1.41x 0.78 inches