Acelink Wireless Doorbell 200m Range Battery Free Wireless Doorbell Plug in 2 Receivers, IP44 Waterproof 4-Level Volume Doorbell Kit White

Acelink Wireless Doorbell How to expand your wireless doorbell system 1.Plug the receiver into socket 2.Press volume button of receiver and push button at same time for 3 seconds 3.Repeat above actions to add and pair multiple transmitters and receiversFeatures: 1.IP44 waterproof 2.200m/600ft long range 3.45 melodies for choosing from 4.LED indicator flash design 5.Easy to install, plug and pla...