Item Type: BT ReceiverMaterial: Aluminum AlloyBattery Type: Built in 500mAh Li Ion Battery (Included)BT Version: 5.2Transmission Distance: Approx. 15m/49.2ftSound Decoding: SBC, AAC, APTX, APTX HDBT Protocol Support: A2DP, AVRCP, HFP, HSPFrequency Range: 2400MHz-2843.5MHzFrequency Response: 20Hz-20KHzInput: BT SoundOutput: AUX, Optical Sound, Coaxial SoundCompatibility: For Android, for IOS System Cell Phones, Tablets, TVs, Game Consoles and Other BT Devices, and Sound Devices with Sound Input InterfacePackage List1 x BT Receiver1 x Data Cable1 x Antenna1 x Instruction Manual1Plug And Play: Bluetooth receiver without installing driver, plug and play, more convenient, so that the old device easily have Bluetooth function, a set to achieve dual sets of output, more powerful. 2Multi Interface: This Bluetooth receiver has multi device expansion port, support Bluetooth receive mode and optical coaxial headphone output, AUX sound output, so you can feel better connection effect. 3Applications: Wireless receiver can be used to upgrade old speakers, connect old speakers or amplifiers AUX, RCA interface and optical coaxial interface, to solve the problem of speakers can not use Bluetooth playback. 4Bluetooth 5.2: Wireless music adapter using Bluetooth 5.2 chip, transmission signal stability, low latency, high restoration so that the sound signal in the wireless transmission, 15 meters barrier free transmission. 5HIFI Sound: Support for all kinds of amplifiers, old speaker equipment, strong signal without delay, APTX HD HiFi, enjoy CD level sound quality, HIFI sound data restoration.