... Built-in rechargeable Li-battery, 3 hours continuous working 8- No less than 10 meters line of sight ... ;AAC; Dolby Digital 2.0/5.1; DTS 5.1; LPCM 5.1/7.1Transmission Distance≥10 meters line ... ;HDCP1.2 protocolsOperating Frequency5.15~5.25, 5.25~5.35, 5.47~5.725, 5.725~5.850 (GHz)Bandwidth20MHz/40MHzModulation ModeForward ... PointRegulatory ComplianceFCC;CE; MIC etc WHDI 5.85GHz wireless hdmi A/V kits