Specifications:
* Bluetooth MP3 Sunglasses Supported
* Colour option:Black / Silver / Blue / Red / Pink / Military color
* USB interface Supported
* Signal-to-noise ratio:87.2dB
* Compatible Playback Modes:Random play
* External hard drive function
* Digital formats supported:MP3/WMA
* Audio Additional features:Auto-power off
* Earphones type:Binaural
* Mfr estimated battery life:5hours continuous
* Charging Time:3hours continaully
* Battery Type/Capacity:Built-in Lithium lon Polymenr/3.7v, 150mAh
* Maximum imput power rating:5VDC, 150mA
* Voice output power:55mW
* Voice output frequency:20Hz-20KHz
* earphone impendance:16 52905*2