Sport MP3+Headphone+FM
MP3 specification:
PC Interface support: USB2.0
Music formats supoort: MP3
SD card support: 64MB-32GB
O/S: Win98/SE/ME/2K/XP/Win7
Operating Voltage: 3.4V-4.2V
Battery capacity: 120mA

Headphone
Specification:
Type: Stereo Headphone with Mic
Speaker: ∮ 27mm
Imepedance: 32Ω
Frequency Response: 20Hz-25000Hz
Sensitivity: 106dB
Rated Power: 20mw
Microphone unit: 4.5*2mm
Cable Lenth: 1.5m
Plug type: 2.5mm earphone, 3.5mm computer

FM:
FM rate: 87.5-108
Operating current: 15mA-35mA
Operating Voltage: 3.4V-4.2