1. Monitor + Intercom Call + Talk + Unlock 2. When visitor presses the button of outdoor station, double ding_dong sound will ring and the image of visitor will be displayed on indoor unit. 3. Pick up handset to talk with visitor for 90 seconds at most, if there is no answer, the image of visitor will be turned off automatically after 60 seconds. 4. Press Unlock button to release electric lock. 5. Press Monitor button to monitor outside. 6. Press Intercom Call button of main unit to have communication with sub-branch. 7. When sub-branch rings, press intercom Call button to have communication with main unit. 8. The video door phone could be expanded to 2x Outdoor Stations and 4x Indoor Units 9. Switch Brightness button to adjust brightness. 10. Switch Chroma button to adjust chroma. 11. DIY system, easy installation with 5-wires plus Video-wire. 12. Compatible with 4inch Video Door Phone with handset.Trademark: TG or OEM Model: TG-03 Productivity: 50000 Unit Price/Payment: FOB ,CFI,CIF
