High Resolution (480*640) Portable 2.8" LCD Monitor with Li-Lon Rechargeable Battery. * Support CCD camera of power source. Max electric Currency 600mA, other CCTV testers only 350mA. It"s convenient for user to check camera condition and correct direction of camera, so to make installation and repairing easier. * 2.8" high image resolution (480*640) monitor enable to show clear image that any place to use. * Equip with Lithium battery of high capacity. Full recharge durable 2.5-5 work hours. * 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.