Features 1.[Bluetooth Receiver & Digital Optical Coaxial to Analog Converter] The converter can freely receive most Bluetooth convert digital to analog signal. You can wirelessly transfer music from your phone to your device. 2.[All In One Device] Bluetooth receiver digital to analog converter U disk playback adapter. About 20m / 66ft barrier free transmission stable signal. Bluetooth 5.1 transmission is clearer. 3.[Supports U Disk Playback Volume Adjustment] Support U disk lossless decoding and playback no driver required. Support volume adjustment. Wired to wireless turn your wired speaker into a Bluetooth speaker. 4.[Basic Parameters] Aluminum alloy shell material; 75 output impedance; Bluetooth 5.1 version and decoding chip; HiFi level performance; A2DP/AVRCP support. 5.[Wide Applicability] Suitable for TV game console CD player MP3 etc. It perfectly solves the limitation of equipment and expands the functions of various equipment. Specification Item Type: BluetoothDACConverterMaterial: Aluminum Alloy ShellModel: D18Bluetooth Version: 5.1Bluetooth Name: D18Output Impedance: 75Decoding Chip: Bluetooth 5.1Effective Distance: Approx. 20m / 66ftPerformance: HiFi LevelSupport: A2DP/AVRCP Package List 1 x Bluetooth Receiver & Converter1 x Charging Cable1 x Coaxial Cable1 x AUX Cable1 x Manual Note The default power on mode of this product is Bluetooth receiving mode; The U disk cannot be switched to the U disk playback mode if it is not connected to the device.