Portable Bluetooth speaker: Small and portable, the Bluetooth speaker lets you listen to your music, videos or games wherever you are. Put it in your bag and off you go. Enjoy sound without being tied down with wires. Play all night/day. The size may be slim but the built in batteries last for up to 11 hours on a single charge. Or plug the speaker into a wall charger or computer with the included standard size micro USB charging cable and play through all day/night. Hand free calls. Use the built-in microphone to make and answer calls on your phone or have hands-free web enabled conversations using your tablet or computer. Great when you need to bring more friends and colleagues into the conversation. More connect way not only Bluetooth 3 optional load music: Bluetooth (wireless), 3.5 stereo cable, USB. Specification: Built-in Mic function, super bass, Support TF, U-dish Play, support headphone, Working Hours: 40, Audio input, item size: 43 x7x 5 cm (L x W x H). Item weight: 1037g.