Portable battery with a capacity of 4,000 mAh and speaker with bluetooth transmission. The battery has 3W, 2.1 EDR bluetooth transmission up to 10 m away. It has a capacity of 4,000 mAh, charging time from 5 to 6 hours and playing time up to 30 hours. Contains built-in microphone for conference calls, play/stop button directly on the speaker. Compatible with all devices that support connectivity with bluetooth transmission. Includes USB cable and Jack/Jack. Suitable for charging devices compatible with Android and iOS systems. 144 x 26 x 80 mm