Sound box type: portable bluetooth speakersAdjust way: buttonsFunction characteristics: bluetooth audio input、 bluetooth hands-free calls、 the LINE、 IN TF cardProduct featuresProduct features\t\t\t1.quality: top grade、 durable.\t\t\t2. Bluetooth wireless transmission、 support for hands-free calls\t\t\t3. Support the TF card automatic playback function\t\t\t4. Suppor computers、 mobile phones、 MP3 players and other audio interface\t\t\t5. Small capacity greatly、 large volume、 high vigorous powerful\t\t\t6.Battery capacity:400 MA\t\t\t7.extentive memory:16g\t\t\t8.effective distance:8 meters、support blutooth:30meters\t\t\t9.appearance size: 61*61*62mm\t\t\t\t\t\tIncluded\t\t\t1x Bluetooth portable speaker.\t\t\t1x USB power cable.\t\t\t