Description Crystal clear high quality sound: Mid and high frequencies, distinct from our two precision acoustic drivers, deliver excellent stereo sound and enhanced bass from our exclusive passive radiator design. Built-in 2 x 40mm dual-driver portable speaker with crystal-clear sound and strong bass without distortion even at the highest volumeLouder volume and more bass: The small speaker could deliver 30% more volume and richer bass than other competitors. The 3W + 3W HD crystal-clear deep bass speaker for outdoor and indoor active use: room-filling sound, perfect for home, dorm, kitchen, bathroom, car, parties; music streaming or internet radio services such as Pandora and SpotifyBluetooth 4.2 The bluetooth receiving range of up to 10-20m offers you the fastest and most stable bluetooth operation. With built-in microphone, answer a call by pressing the button on bluetooth speakers. Also support MP3, WAV, WMA, FLAC format to plug in micro SD / TF card, and you can plug it in with other Device, such as PC, apple, mac and tablet by 3.5mm AUX cable (included)Ultra portable: less than 13 ounces, the size of the portable bluetooth speaker: 7x2.5x1.7 inches. 2000mAh large capacity rechargeable lithium battery allowing a maximum of 6 hours of playback at 2/3 volume and full charge. Suppot TF Card / U Disk to play and store music files, so you carry the media library. Integrated FM radio. Much better for travel and hiking