1) 4" color TFT display, 4-wire connection

2) Handfree talking, Door releasing, Video monitoring

3) Linkage to sub-phone by 4-wire cable

4) Two configurations: 1 outdoor unit to 5 indoor units

2 outdoor units to 5 indoor units

5) White ABS plastic

6) Installation: Wall mounting

Power supply DC 13.5V/1A

Wiring 4-wire,

Talk Handfree

Cable condition 50m/165ft for RVV22#4x0.65mm

Ambient temperature -10oC~40oC

Dimensions 120x180x23mm