Commax Door Phone Single

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