MP3

Technical Parameter and specification
PC Interface Supported: USB 2.0
Music formats supported: MP3 WMA OGG
SD Card Support: 128MB-32GB
Operating system
Windows 98/SE/ME/2K/XP
Vista MAC OS 9.2and over
Operating Carrent:≤30mA
Operating Voltage:3.3v
Headset Size:90mm(L)×90mm(W)×46mm(H)

HEADPHONE
SpeciFicaTion
Type:Stereo Headphone With Mic
Speaker:Φ27mm
Sensitivity:115dB S.P.L at 1KHz
Impedance:32Ω
Frequency Response:20Hz-20.000Hz
Rated Power:20mW
Power Capability:100mW
Cable Length:1.72m
Microphone Unit:4.5×2mm -58dB±3dB
Plug Type:Φ2.5mm stereo

Bluetooth
Specification
Bluetooth version: Bluetooth V2.0
Transmitted power: class 4
Receive sensitivity:-85dB
Continuous talking time: about 8 hours
Standby time: about 80 hours
Operation range: within 10 meters
Operation voltage:≥3.5V
Operation current:≤25mA
Standby current: ≤2mA
Bluetooth frequency response:24GHZ

power supply:

rechargeable by lithium battery 

Function:

read SD CARD Play music by SD card

with bluetooth function

with Audio splitter

with FM fuction