Selling points
1) Patent technology
2) Link speakers together for an even bigger sound
3) Expandable bass chamber
4) Up to 12 hours playback
5) Build in 3.5mm audio cable
6) Rechargeable battery
7) Powerful 40mm driver
8) Pass CE RoHS, 365 days warranty

Technical parameter
Power supplier: USB/ Lithium battery
Output: 3 W
Frequency: 280Hz-16kHz
SNR: ) 80dB
Response Senstitivity: 80dB
Power Input: L/ R320mV
Impedance: 4 (Ω )
Speaker Unit: 40mm
Case Material: Pure ABS
Dimensions: Close: (Φ ) 60.2mm* (H) 47mm
Open: (Φ ) 60.2mm* (H) 73mm
Weight: 90g
Color: Black/ Red/ White

Feature
1) The bass speaker is a compact, powerful device, which can easily fill a room with high quality sound
2) Simply connect the speaker to any device with a 3.5mm jack and prepare to be blown away by the compact speakers volume.
3) The bass speaker has a built in rechargeable battery, which can be charged using the supplied USB cable and lasts for up to 12 hours from a single charge