... defense zones 4.CE sell wireless digital home security LED lightmodel name:REH320Advantage features:1. Easily ... Two-way voice to communicate. The standard kit has voice speaker, so users can use directly ... cell phone anytime, wherever you are. For security reasons, the password must be input for ... of green board Relay----------to control the home applianceSpeaker------two-way voice communicationL1,L2,L3 ...