1. Built-in bass system, the bass is more powerful\r\n2. Portable retro design, compact and easy to carry\r\n3. Bluetooth 4.2 stable connection, strong anti-interference\r\n4. 10 meters wireless transmission distance, high efficiency and stability, strong compatibility\r\n5. Built-in 1800mAh lithium battery, long-lasting battery life\r\n6. Support TF card playback\r\n7. Power supply: DC 5V\r\n8. Frequency range: 90Hz-20KHz\r\n9. Playing time: about 8 hours\r\n10. Charging time: about 2 hours\r\n11. Product size: 151 x 85 x 87mm / 6 x 3.3 x 3.4 inches