1 7” HD screen 2 Supports NTSC / PAL video transmission 3 Digital wireless avoid the interference from other 2.4GHz devices data privacy protection (Supports user ID identification) 4 4-Channel digital wireless camera and DVR system easy installation 5 Built-in four split function built-in video recorder support up to 32GB TF card. 6 Supports dynamic recording saving storage space. 7 Multiple display modes: Single picture four pictures display 8 Supports four cameras / 24 hours / 7 days continuous cover video recording 9 Visible video output or input 10 Anti weather interference outdoor cameras open range up to 300 m / 1000ft Wireless camera performance: Transmission frequency: 2.4GHz~2.48GHz Transmission power: 17dBm Sensor: 1/4” CMOS Effective Pixels: PLA628(H) x 582(V) NTSC510(H) x 492(V) Horizontal resolution: 380TV Line Transmission signal: Image / Audio Minimum illumination: 0Lux (IR on)/ 5LUX (IR off) Transmission distance in open field: 150m Power adapter: DC 5V / 1000mA Wireless receiver performance: Receive frequency: 2.400GHz～2.480GHz Receive sensitivity: -98dBm LCD: 7 inch digital screen Resolution: 800 x 3 (RGB) x 480 Video output: PAL / NTSC Video format: JPEG (Single recording 640 x 480 at 30 fps)