TM-35B CCTV TFT LCD 3.5” MONITOR WITH NETWORK TESTER Features Installation testing even when power source is not available using an internal battery. 3.5" TFT Display Screen, Resolutions: 960 x 240. ADSL detection. With Network cable Test function. Portable Armband Design for more Convenience. Easy to Debug the Camera Focal Length, Focus and Angle Position. Support Audio and Video function. Support Automatic PAL/NTSC identification. Support 3 minutes Non-Video automatic Sleep function. Built-in 3.7V/1600mA Lithium Battery.