... video u Control PTZ protocol cctv tester Features:u 2.8" TFT-LCD screen, English menu, display signal systemu Test ... SIGNAL TESTINGVideo mode:PAL / NTSC auto adjustDisplay screen:2.8 inch LCD color display screen, 960 X 240 resolution Video input ... Support RS323, RS422, RS485 at the same timeCommunication protocol:Compatible with various protocols: Pelco_D, Pelco_P, Samsung, Panasonic, Minking, Vido, ...