D400 NFC Optical Bluetooth 5.3 Receiver Audio Fiber Coaxial Adapter Support USB Flash Drive/TF Card Playback •Configuration of rich interfaces: support AUX/optical fiber/coaxial interface/U disk/TF card/microphone,meeting a variety of applicable needs •Experience wireless music playback: make the old power amplifier have Bluetooth function,support optical fiber coaxial port output to the power amplifier device. No need to throw away the idle power amplifier,experience wireless music playback •Connect the microphone to sing: equipped with a professional K song chip,realize the KTV experience at home party. The singing voice is very clear •Convenient to use: Comes with a remote control to adjust the volume/cancel the original sound,etc •Specification: •Bluetooth version: 5.3 •Input power: DC 5V Type-C charging •Battery capacity: Host: 500mAh battery; Remote control: 200mAh •Charging time: about 1 hour •Listening time: about 12 hours •Standby time: about 30 days •Transmission distance: 30m •Product interface: Optical fiber/U disk/AUX/MIC microphone/coaxial/TF card (USB Flash Drive and Card Not Included) Package included: •1 x Bluetooth Receiver •1 x AUX Cable •1 x RCA Cable •1 x Charging Cable •1 x Remote Control •1 x English User Manual •Other things not included