Shrox BTS-SHBK Mini Portable Shrox Bluetooth Speaker, Powerful, Loud and Clear Sounds with Bass (Black) Bluetooth v4.0 compatible Class II 4.0W power output up to 30 feet Supports AVRCP1.0, A2DP v1.2 and multipoint A2DP connection to 2 devices or phones Integrated audio line-in AUX 400mAH rechargeable lithium polymer 3.7V DC battery