Sound box type: portable bluetooth speakersAdjust way: buttonsFunction characteristics: bluetooth audio input、 bluetooth hands-free calls、 the LINE、 IN TF cardProduct featuresProduct features 1.quality: top grade、 durable. 2. Bluetooth wireless transmission、 support for hands-free calls 3. Support the TF card automatic playback function 4. Suppor computers、 mobile phones、 MP3 players and other audio interface 5. Small capacity greatly、 large volume、 high vigorous powerful 6.Battery capacity:400 MA 7.extentive memory:16g 8.effective distance:8 meters、support blutooth:30meters 9.appearance size: 61*61*62mm Included 1x Bluetooth portable speaker. 1x USB power cable.