AIBIMY MY551BT Bluetooth speaker offers a great quality sound with Bluetooth 2.1 technology. With the ultra-compact size and portable design, it can be easily fitted into a backpack, suitcase, or a travel bag. The built-in 2000mAh rechargeable battery enables over 10 hours of playtime on a single charge. It is ideal for personal usage, indoor party, outdoor BBQ or picnic with friends and family.