17-inch TFT LCD with HD refinition, no radiation, low power consumption, high definition widescreen image. 2Hands-free intercom function with clear sound, you can talk with the visitor whenever and wherever you are. 3Waterproof outdoor unit, aluminum alloy shell, durable to withstand various outdoor environments. 4Night vision infrared function, keep clear image even in the dark night. 5Wall-mounted installation, simple and convenient.Features: 7-inch TFT LCD with HD refinition, no radiation, low power consumption, high definition widescreen image.Hands-free intercom function with clear sound, you can talk with the visitor whenever and wherever you are.Electronically controlled unlocking function.There is a function of monitoring outdoor.Image brightness, chromaticity and volume can be adjusted.Aluminum alloy outdoor unit with anti-oxidation and wear-resistant surface treatment.The indoor machine ultra-thin design, aluminum panel, electroplating button, beautiful and full of luxury style.25 kinds of chord sounds are optional, and you won't always hear monotonous doorbells.Waterproof outdoor unit, aluminum alloy shell, durable to withstand various outdoor environments.Night vision infrared function, keep clear image even in the dark night.Wall-mounted installation, simple and convenient.Specifications: Plug Type: US/EU/UK/AU 100-240V Display Screen: seven-inch high-definition liquid crystal display Resolution: 800*480 Connection Mode: RVV4 core connection / RVV5 core connection (the longest distance is 100m) Power Supply: Input Voltage: AC 100V-240V, Output Voltage: DC15V 1.2A Power Consumption: Standby Power Supply Mode: indoor extension power supply Connection Mode: RVV4 core Nifgt Vision: Five LED Infrared Night Light Supplementary Lamps Optimum Distance for Night Vision: 0.2-1.m Camera Angle: 90 degrees Working Temperature range: -20-+60 degrees Celsius Host Material: ABS Plastics Ring Tone: 25 chords Installation Mode: paperback installation Waterproof: support Package Weight: 1073g/37.8oz Package List: 1 x 4 core wire 1 x 2 core wire 1 x 5 core wire 1 x Hanging Wall 1 x Power Plug Strip 1 x Test Line 4 x Screws 1 x User Manual 1 x Wrench + 1 x Screw