LCD35SV is a type of product that summarizes views of first-line safety engineers and it is developed specially for technical personnel to debug the front camera conveniently. It has some functions, like on-site access to camera images andproviding temporary 12V DC power supply for the camera. The product is built with 18650 lithium battery, providing powerful and reliable power supply for the device, along with the function that it will shut down automatically without video signal for 3 minutes. All the master controls use ultra low power decoder chips and MCU, providing eight hours of long working time. LCD35SV is a practical tool for security project commissioning and maintenance technicians.