CE,UL and ROHS Approval, 4" screen,handset intercom,waterproof,competitive price and best quality, strong applicability. Detailed Product Description* Handset intercom* Display visitors* Door remote unlocking* Adjust contrast and brightness* Supervise the front door situation anytime* Suitable for single house,office or villa.modelT-905Cpower supplyDC18V/AC 100~250VCRT/LCD4" TFT-LCDResolution480H ...