Panasonic KX-TG6074B 5.8 GHz Digital Cordless Answering System with 4 Handsets Advanced digital cordless phone system with 4 handsets and 5.8 GHz frequency-hopping technology Intercom between handsets Will not interfere with wireless networks such as 802.11b or 802.11g WiFi Talking caller ID (service is required for use); built-in 18-minute digital answering machine Light-up indicator with 3 color options