Features: 1.) Bluetooth 2.) Plays Mp3 files stored in SD card USB drive/external audio de. 3.) FM radio 4.) Guitar input 5.) Remote control 6.) Microphone inputs 7.) 5 Band graphic equalizer 8.) Wireless microphone included 9.) Built-in 12V/7A rechargeable battery 10.) Microphone priority on/off switch 11.) Super dynamic sound speaker Playback Time: 2.5-3 hrs at full vol,4-5hrs at 50%vol. 2.) Speaker: Two 10",4 ohms, 100mm magnet 40hz-2khz 3.) Tweeter: One 25mm, 6ohms,80mm magnet, 1khz-20khz Connection: 1.) This unit applies to AC 110V- 240V-50/60Hz:, 2.) AC Power: The battery will charge when it is connected to the AC power. The red light indicates it is charging. The green light indicates it is fully charged., 3.) The internal battery will charge even when the unit is switched off as long as it is plugged into the AC power., 4.) Adjust the function keys to suit your audio preference. How to Pair with Bluetooth: Select Bluetooth mode ("BLUE") on the unit. The Bluetooth logo will twinkle and an alarm sound will be heard. Ensure you enable the Bluetooth function on your Bluetooth device and search for the unit. Once found, click on it and it will pair automatically Control Panel Function: 1.) Power Switch, 2.) Led Light On/Off Switch, 3.) Power Input, 4.) Volume: Adjust The Master Volume, 5.) Bass: Adjust The Bass, 6.) MIC Echo: Adjust The Echo, 7.) MIC Bass: Adjust the Microphone Bass Volume, 8.) MIC Treble: Adjust the Microphone Treble Volume, 9.) MIC VOL: Adjust the Microphone Volume, 10.) GUITAR VOL: Adjust The Guitar Volume, 11.) MIC PRI: Microphone Priority On/Off Switch, 12.) GUITAR IN: Guitar Input, 13.) MIC IN: Microphone Input