1.Bluetooth Version 3.0, highest at present 2. A2DP transfer Hi-FI music via wireless 3.Competitive price 4.Excellent sound Bluetooth speaker 1.Total tube shape,easy to carry2.45mm Nd-Fe-B magnet speakers, with plenty bass3.Built-in Li-ion battery and automatic recharge circuit4.The latest class-AB amplifier,lower power wasting Operating Voltage3.7VCharging5VOutput Power3wSpeaker Spec2.6Ω ...