•4-in-1 function: supports Bluetooth-compatible reception (RX), Bluetooth-compatible transmission (TX), mobile phone charging, microphone singing (transmitter supports for AirPods) •Music playback: it can read TF card/U disk to play music, support MP3/FLAC/WAV/WAM/APE format songs •Support microphone connection: with 6.5mm aux port, can connect microphone to sing, plug and sing. The microphone has a built-in professional karaoke chip to effectively prevent howling •Infrared remote control: control power on/off/mute/play/pause/up and down songs/volume increase and decrease/sound source switching •Widely applicable: supports 110~240V power direct plug, universal worldwide •Easy charging: built-in QC 2.0 fast charging module, supports 2.1A dual USB fast charging •AUX+RCA dual output: can connect 2 speakers and other devices at the same time •Bluetooth-compatible 5.3 transmission: connection distance is about 10-20 meters, built-in high-definition decoding chip Specification: •Bluetooth-compatible Version: Bluetooth-compatible V5.3 •Transmission Range: About 10-20m •Interface: 3.5mm Audio port, RCA, 6.5mm Audio port, Charging port, U disk port, TF card port •Input: AC 100-240V 50/60Hz 0.5A •Support Protocol: A2DP/AVRCP/HFP/SBC •Support Protocol: MP3/WMA/SBC/WAV/DTS/A52/FLAC/AAC/AIF/AMR/APE •Using Method: Drive free (Only for M16 Pro Optical Version) •Product Material: High strength PC+ V0 fireproof •Basic Functions: Bluetooth-compatible receiver, Bluetooth-compatible transmitter, Singing, USB flash drive playback, TF card playback, Infrared remote control, Phone charging •Support Devices: Speaker, desktop computer, laptop, TV, power amplifier, projector Package included: •1 x Bluetooth-compatible 5.4 Transmitter •1 x RCA Cable •1 x AUX Cable •1 x Remote Control •1 x English User Manual