Manufacture and sales of security products, included Motion Detect personal video recorder (PVR) , security color ccd camera, mini ccd camera, bullet ccd camera, wireless PVR, the worlds smallest 2. 4g wireless transmission and receiver, Pocket Digital Motion Detect Audio / Video Recorder, Universal Portable UPS battery Bank, GSM / CDMA Remote Mobile Phone Alarm, Dental Digital Cameras, waterproof + shockproof + crushproof safety equipment, Wireless baby monitor. Wireless video signal Converter