Item Type: Bluetooth DAC ConverterMaterial: Aluminum Alloy ShellModel: D18Bluetooth Version: 5.1Bluetooth Name: D18Output Impedance: 75Decoding Chip: Bluetooth 5.1Effective Distance: Approx. 20m / 66ftPerformance: HiFi LevelSupport: A2DP/AVRCPPackage List1 x Bluetooth Receiver & Converter 1 x Charging Cable 1 x Coaxial Cable 1 x AUX Cable 1 x ManualThe 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.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.