It has a male 3.5mm (1/8") stereo mini plug on one end and two color coded Stereo female 3.5mm jacks on the both ends.
You can plug two sets of stereo headphones into each jack.
Both red and white jacks does NOT split the stereo signal into separate left and right mono channels, both jacks output has the same stereo signal.

3.5mm Splitter: With this adapter you connect two audio source into one audio output device
Dual-independent volume controls - set it as loud or quiet as you want.
Great for your iPod, Walkman, PDA, computer, hifi system, or other portable media players.

Color:Black
Length: 27CM
Input: 2 Male 3.5mm stereo plugs
Output: 1 Female 3.5mm stereo plug
Excellent sound reproduction and signal to noise ratio

Recommends for:
Apple iPad 1, 2, 3 / New iPad, 4 / iPad with Retina display
iPhone 1st Gen, 3G, 3GS, 4 - AT&T, 4 - Verizon, 4S
iPod 1st Generation, 2nd Generation, 3rd Generation, 4th Generation (Photo) / (Color Display), 4th Generation U2 Special Edition
iPod Classic 160GB (2007), 160GB (Late 2009), 80GB / 120GB
iPod Mini 4GB / 6GB
iPod Nano 1st Generation, 2nd Generation, 3rd Generation, 4th Generation, 5th Generation
iPod Shuffle 1st Generation, 2nd Generation, 4th Generation
iPod Touch 1st Generation, 2nd Generation, 3rd Generation, 4th Generation
iPod Video 30GB, 60GB / 80GB, U2 Special Edition e.t.c

1 * 3.5mm Splitter