Creative ZEN Vision W User Manual page 123

Headphone jack: 3.5 mm (1/8") stereo minijack, 5 ~ 7 mW per channel
DC receptacle: 4.5mm DC jack receptacle
A/V Composite Out: 3.5mm 4-pole phone jack
USB 2.0 port: Standard USB mini-B receptacle
Card reader: CF (Type I and Type II)
Firmware Support
Upgradable via USB (firmware upgrades are available from
www.creative.com)
Earphone Specifications
Frequency Range: 20 Hz ~ 20 KHz
Sensitivity: 112 dB ± 3 dB (I/P Level:1 mW)
Impedance: 32 ohm ± 15%
Plug: 3.5 mm (1/8") stereo minijack