Zealot S5 Portable Bluetooth Speakers Mini Wireless Music Player via Micro SD Card/USB Reader Loud Super Bass(Blue Black) ULTRA-PORTABLE SPEAKER: 7 ounces light-weight & teacup mini sized body fits right in your hand and makes you taking your sound literally anywhere you want. Perfect portable Bluetooth speaker for outdoors & indoors: home, dorm room, kitchen, bathroom, car, parties, travel, sports, ect. OUTDOOR ACCESSORIES: Customized sling cover & carabiner. SUPER BASS: 45mm large driver & passive subwoofers, listen & feel the bass response when music is bumping. Unique diaphragm aeration holes help to enhance clarity and avoid distortion, delivering full-bodied stereo sound, whether crystal clear highs or deep bass FOUR PLAYING MODES: 1; Bluetooth mode: fast sync to your playlist in phone or streaming music services(such as Pandora or Spotify) 2; Music mode from Micro SD Card slot (MP3 format) 3; Music mode from USB Reader port 4; Line-in Mode from AUX port: use 3.5mm audio cable to connect with non-Bluetooth devices ( computer, desktop, PC, laptop, tablet, mac and etc.) LONG BATTERY LIFE & BROAD COMPATIBILITY: Built-in 2000mAh battery, which can last for up to 12 hours playing time on a single charge. Built-in microphone for hands free calling. Works with: iPhones, iPod, iPadSamsung, Tablets, HTC, LG, Huawei, Blackberry, etc. TROUBLESHOOTING:1, The S5 speaker has a RESET button to use whenever the unit freezes up or otherwise fails to operate normally. This reset button is located at the very back of the AUX port. Insert a toothpick (or similar tool) into the AUX port for nearly one inch. After contacting the reset button, you will feel a slight additional movement as you push firmly and the button is pushed in and reset. 2, Suggest to POWER OFF when not in use( to avoid current noise ). 1 Year Warranty.