hot selling 2016 amazon aluminum power bank bluetooth speaker

hot selling 2016 amazon aluminum power bank bluetooth speaker      Dual channel stereo speakers description:  

Item	Dual channel stereo speakers
Bluetooth version	Bluetooth 4.0
Frequency	100Hz-2000KHz
Working distance	10meters
Charging voltage	3.7V-4.2V DC
Working time	10-15 h
Loudspeaker spec	36mm,4Ω,10*2W
Size	6.7'' * 2'' * 2.3''
Battery	4400Mah
Features	Outdoor,Perfect Sound,4400mah battery, waterproof,support hands free calls,2-channel stereo 10*2W,bluetooth wireless,support Usb/TF card/Fm.

  Dual channel stereo speakers Features: 1,Perfect Sound,4400mah battery, waterproof,support hands free calls,2-channel stereo 10*2W bluetooth speaker. 2,Support bluetooth, TF card, FM and USB flash drive for music. 3,Mini size, easy to carry. 4,Through bluetooth to play music freely and answering a call. 5, Accept logo and package customized.   Dual channel stereo speakers Details Picture: