About this item 【Premium Material】The portable Bluetooth speaker provides strong and outstanding materials, durable housing and port cover, so that the speaker has better internal protection. With clear treble, crisp mid-range and rich and wide bass configuration, Bluetooth speakers can provide impressive sound quality without distortion even at maximum volume, which is dazzling. 【Key Function】When playing music (USB card/TF card/wireless/line input), briefly press "Play/Pause". In FM mode, press briefly to search for radio stations automatically. Then press again to stop the search. In wireless mode, when the phone is paired when calling, press short to answer the call hands-free, press again to answer the call hands-free, and press twice to make a call. 【Slot Function】DC 5V slot: use standard Micro USB V8 charging cable for charging; TF/USB slot: When the TF/USB card is inserted into the slot, MP3 format audio can be decoded and played; AUX line in slot: input through external device using Mini 3.5 head; The high-efficiency 3.7V/1200mAh battery can provide 5 hours of working time. 【Portable ＆Convenient Design】Convenient portable speaker, built-in safety wrist strap, to avoid accidental fall when carrying. Small and easy to travel design, easy to put in your wallet or backpack. Round and smooth. Fits the palm perfectly. Best Bluetooth 5.1 technology, connection range up to 10m/32.8 feet, no distortion. 【100% Satisfactory Service】Combine with the high-quality chip, you will be surprised by the powerful loud stereo sound coming from such a compact and portable speaker. Wireless portable Bluetooth speakers should be a must-have in your life. If you have any questions or suggestions about the use and sound quality, we will be happy to discuss them with you and reply within 24 hrs.