Our portable CCTV test monitor can troubleshoot CCTV installations. An LCD display easily allows for checking video signal of the CCTV camera. An audio jack tests the audio signal. A built-in rechargeable battery has a life of 4 hours. The LED light displays low battery level and the visor blocks out sun glare on the LCD display. It is very portable as the heavy duty aluminum casing, durable handle, and shoulder belt are included.