Headline: Mini Beer Bottle Speaker with Expansion Bass & Micro SD Card Slot
Subhead: Compatible with iPod, iPhone, iPad, smartphones, MP3/MP4 players and other audio devices equipped with a 3.5 audio jack

Feature:
1/ Beer Bootle Speaker, new special design
2/ Dynamic internal magnetic 
3/ with TF Card useful function 
4/ Lithium battery, USB Charge power
5/ Audio Output,Input     
6/ Function Switch: Pause, next/previous,Power on/off,TF Slot,
                    Audio-out, Audio-in, USB power
7/ Body Size: H/150mm, Dia./45mm

Specification:  
  1/ output power:3W 
  2/ Frequency response:200HZ-12KHZ 
  3/ Speaker: 40mm,4 Ohms   
  4/ Li-ion Input: 3.7V   170mAh (real)
  5/ Li-ion output:4.2v,+/-0.05v
  6/ Humidity Test: 90-95% RH 24H
  7/ Heat test: -25--+75 degree 
  8/ RF:220Hz±20% 
  9/ S/N Ratio: 75dB±3dB
 10/ DCR(Direct Currency Rated Impedance): 3.2Ω± 5%