Bluetooth Speaker Super Bass Subwoofer 

The Bluetooth speaker is retro appearance, fashion and cool. And the knob is more convenient to control. Features: Bluetooth Version: 4.0 Input Impedance: 10KΩ Bass Unit Impedance: 4Ω Input: DC 5V Output Power: 5W+2.5W*2 Charging Time: about 3h Playing Time: about 4-6h (depends on playing volume) Battery ?Capacity: 1800Mah Frequency Response: 80Hz-20KHz Control: Volume/BT/Remote Control/USB/TF Size: 120*155*190mm