1) wireless doorbell with audio intercom, 2) DECT, cordless telephone, 3) Unlock module, 4) Frequency: 1.8G, 1.9G Wireless doorbell with DECT,CL-3624 ... Technical Specifications1. CE (EMC LVD TBR6)2. Standard: Digital Enhanced Cordless Telecommunication3. ... DECT phone features2,Use the handset to talk with outdoor station3,Use the handset to unlock the ...