Low power consumption LED / high-resolution digital display TFT LCD .built-in 2200mAh Li-ion battery do not need an external power supply working time is about 3-4 hours AV output and input function. with DC12V output(use of camera).Unique star search guidance function and satellite finder management Built-in protecting circuits for high-frequency tuner external short circuit alarm.13V18V/22K/signal lock indicator located in machine panel it can be displayed at the same time .Due to the use of handheld structure this machine is small in size and light in weight. Equipped with installation tool backpack it is more convenient to carry it is a professional equipment for satellite TV receiving system engineering control engineering and technicians.