... proof IP65 3) CE certificate 4) Up to four indoor DECT phones Wireless intercom with DECT model 3622: Technical Specifications1. CE (EMC LVD TBR6)2. Standard: ... size alkaline batteries Features1,Support all DECT phone features2,Use the handset to talk with outdoor station3,Use the handset to ... unlock the door (optional)4,Waterproof with IP 655,Full hands-free speaker6,High quality sound7, ...