Easy to use do it yourself wireless doorbell alert system for home or business lets you know when theres someone at the door for your convenience security connect in minutes with easy mounting pairing convenient wireless operation uses 3 x aa batteries for receiver position the doorbell at your front or back doorway enjoy the convenience of wireless with a long range up to 200ft60m from the doorbell to receiver the receiver unit emits an audible chime lights up when the doorbell is