Note The battery will be changed to 18650 battery case in order to facilitate transport and it doesn t have balance plug for DVR module the DVR module should use another power supply thank you for your understanding The receiver on EV100 Goggles doesn t receive audio But the goggles support audio input that you can hear the audio if inputs the video to goggles DescriptionBrand Name EachineItem Name EV100Size 165mm 76mm 30mmWeight 221g with battery 57g and antenna 13g Package Weight 400gDisplayResolution 720 540FOV 28° diagonalIPD 58 68mmRatio 4 3Focal length adjusting under 400 degree of myopia and hyporopia 150 degreeSpecificationFrequency 5 8G 5333Mhz 5945MhzSensitivity 93dBAntenna Impedance 50ΩAntenna Gain 3dBiAntenna Connector RP SMA Video Formate NTSC PALSupport AV IN OUTSupport Focal Length Brightness Contrast AdjustmentSuport Firmware Upgrading Power Input 7 4VLow Voltag 6 8VBattery 18650 battery caseCharging USB Cable not included Working Temp 10â?? 40â??Features Support AV Input and Output it doesn t support Audio in FPV mode for the build in receiver can t receive audio But in AV IN mode the audio is available Support External HDMIto AV ModuleSupport External DVR moduleSingle receiver with Dual Antennas enhance the reception and stable performance With Fan can defog the glasses for good visual experience Adjustable focal length allows pilots under 400 degree myopia view directly via naked eyeAdjustable IPD 58