Mini Portable Speakers Bass Stereo Speaker Column Subwoofer Support Handsfree TF Card AUX USB MP3 Player Product Feature : * Support TF Card, AUX input, USB Play * With Hi-Fi speaker, to sure the clear and bright sound quality. * International advanced chip and circuit design techniques, support al device. * Dual power suppor by Mini USB charging battery, smart and . * Play music after connect device for example Phone / Computer / TV. the working distance is within 10M. * Support caller hands-free function. True Stereo： TWS pairing becomes a stereo speaker system. (if you need this experience, it is recommended to buy 2 speakers) No need for any wired connection, within 10 meters two speakers can be paired to form a stereo system. Bring you a live surround sound experience. Operation method: 1. Turn on the two speakers (in mode at this time) and press and hold the "M" button of any one speaker. 2. Pairing is successful, there will be a prompt sound,and the pilot lamp is always on. 3. Turn on the phone ,then connect the speaker. Product specifications : * Version: 4.2+ERD *Working Distance: 10M *Voltage: DC 5V *Loudspeaker: 4Ω 3W *S / N Ratio:≥ 60db *Frequency Response: 70hz-18khz Packing list: speaker* 1 Charging cable* 1 3.5mm AUX audio cable* 1 Packing Box* 1 KEY FUNCTION : 1 . power switch : off to close , on is working . 2 . DC 5V charging slot . 3 . Micro SD slot : it can decode and play MP3 format audio when put Micro SD card into the slot . 4 . line in : it can play audio via AUX cable to audio device . 5 . when play music , press short to switch TF / / line in . 6 . press short for last song , press long to turn down the volume . 7 . press short for next song , press long to turn up the volume . 8 . when play music ( TF card / LINE / ) , press short for play / pause ". 9 . under mode , press short to answer a call hand-free when phone calling , press again to hand up , press long to disconnect .