HDHawk 4.3" Wrist TFT LCD HD Security AHD CCTV Camera Monitor Tester With 12V Power Output , Analog CVBS Camera Test , Analog Video Test, Cable Test With Emergency LED lighting,Power Supply to Mobile HAND-HOLD DESIGN FOR PROFESSIONALS- Easy operation without taking off gloves speeds your works.Clasp ring at bottom fits to all chains and use in all environments HIGH DEFINITION - 4.3 "TFT - LCD HD screen ,Resolution:480 * 272 EMERGENCY POWER SUPPLY- 12V 1A Output function can be helpful when no external power supply for the camera; 5V 1A power for Emergency LED lighting and mobile phone MULTIPLE TEST FUNCTION- 1080P/720P AHD Cameras Test based on coaxial cable(Support TVI (Hikvision) coaxial HD test) ;Analog CVBS Camera test; Analog video test; network cable test,etc LONG WORK TIME- High capacity li-polymer battery, charge time 4 hours, and work time around 8 hours