Mini Digital Telescopic Speaker for MP3 MP4 Purple
Features:

Perfect combination of classic and modern performance
New mini aluminum vibration film loud speaker has clear alt and pure woof, perfect tone
New concept integral stereo portable mobile music, connecting MP3, MP4, notebook li>
Also only used to charge under speaker off or on status
Metallic shell shows noble and fashionable, out of ordinary!
Several power supply manners including battery, adaptor (not included), USB port allow you enjoy music at any time
Speaker`s Functional Parameter

Output: Rms 4w (2w+2w)
Frequency response: 150-18000HZ (+/-3Db)
Signal and Noise Ratio of power amplifier :> /=60dB
Loud Speaker: 1.5 inch (extermal diameter 40 mm) magnetic resistant 40hms
Line Input: Configure 3.5 mm stereo`s plugs
Power supply input: 4x1.5V DC-6V, USB.