... Li-lon battery, do not need an external power supply,working time is about 3-4 hours, AV output and input ... /22K/Signal lock instruction,With LNB circuit short protection, external short circuit alarm,it can block strong sunshine,which helps ... receiving system engineering ,control engineering and technicians. SpecificationTFT LED 3.5"(89mm); Display size:73*51mmDots pixels:320*240(230400Pixes)LNBinput ...