Commax Single Door Phone Hd Voice: 2.2 times clearer sound via HD VOICE(High Definition Voice) Door release enabled by touch of a single button 1:1 talking and paging Power source: 110V, 220V, 60hz Effective Range: Open area: 250m (with barrier : 50m) Frequency: 1.7 Ghz Categories: DOOR PHONE, HOME APPLIANCES Tags: Commax Single Door Phone, Door Phone
