/>Hi-Fi/ Low Latency, Switch at 1 KeyYou can switch to Hi-Fi mode when watching movies or listening to music and use Low Latency mode when playing games. Note: The connecting devices should support aptX HD and aptX LL.Transmitter ModeIt converts the audio signals of audio transmitter like TV into BT signals and send them to BT headsets. And It support connecting 2 BT devices like BT headset, etc with 2 devices using one codec.Dual MethodsYou can choose to input audio through AUX cable or USB interface.External AntennaWith external antenna, it offers ber signal and stabler connection.Indicator LightIt flicks blue light when connecting with 1 device and green light when connecting 2 devices. And you can also know the codec mode easily from the specific area.Voice CallYou can make voice call while playing games, but only for the first connecting BT headset and second one does not support this function. (USB Mode)Plug N PlayNo drivers required, easy to use.Note: It supports APTX LL, but the connecting devices should support APTX LL, too. And it also supports APTX LL when connecting 2 BT devices.Specification:BT version: 5.0Supported protocol: A2DP, AVRCPFrequency range: 2.402GHz-2.480GHzInput interface: USB, AUXPower supply: USB DC 5VOne for Two Function: SupportCodec: APTX HD, APTX LL, APTX, SBCInput voltage: DC 5VOperating distance: 10m (no obstacles)Item size: 83* 28.5* 14mm/ 3.27* 1.12* 0.55inItem weight: 24g/ 0.85ozPackage size: 150* 88* 18mm/ 5.91* 3.46* 0.71inPackage weight: 45g/ 1.59ozPacking list:1 * BT 5.0 USB Audio Transmitter1 * 3.5mm audio cable1 * External antenna1 * User manual