Specifications:1. The appearance of the product is exquisite. Using Bluetooth-compatible 5.0 chip design, stronger compatibility and stability. Bluetooth-compatible receiver (RX), Bluetooth-compatible transmitter (TX) 2-in-1 design, toggle switch to switch quickly.2. Equipped with high-definition LED digital display, working status and Bluetooth-compatible mode are clearly visible. Built-in digital to analog chip, supports six signal interfaces of digital optical fiber, coaxial, AUX, RCA, U disk, and TF card.3. Upgrade the NFC function, the mobile phone can connect with one button. Cool breathing light, red/blue color, soft and not dazzling.4. Built-in 500mAh rechargeable lithium battery, long battery life. Support USB (U disk), TF card playback and transmission. Support 5-8 meters infrared remote control, all kinds of functions are readily available.5. Built-in high-definition microphone, support wireless music listening, hands-free call, navigation. Description:Bluetooth Version: :Bluetooth-compatible V5.0Battery：:3.7V/500mAh 602535 (UN38.3）Frequency range: 2400-2483.5mhzPower supply mode: type-C interfaceUsing Time::Listen to music for about 10 hours and stand by for 30 daysTransmission Range: :10m (barrier free)Interface: :3.5mm AUX/2RCA/COAXIAL/OPTICALInput Parameter::DC 5V-2.1A(MAX)Support Protocol: :A2DP/AVRCPProduct Dimension: :about 92*65*20mmUsing Method::Drive freeProduct Color::BlackProduct Material::High strength fireproof ABS+PCBasic Functions: :Bluetooth-compatible reception, Bluetooth-compatible launch, U-disk playback, tfcard playback, infrared remote control, key operation, digital fiber / coaxial input, NFCSupport Devices: All kinds of speakers、desktop computer、 laptop、 TV、 power amplifier、projector Package included:Bluetooth adapter x1Red and white lotus thread x13.5mm audio cable x1Infrared remote controller x1Type-C charging cable x1instructions x1