Many mobile phones, PDAs and other devices use a small 2.5mm plug instead of the standard (3.5mm) headphones jack.
Male: 2.5 mm
Female: 3.5 mm
This can often be forced to use the original headphones.
This adapter allows your own favorite headphones or speakers to use at any apparataat (PDA, GSM, MP3 player) with a 2.5mm jack.
Cable Length included Connections: 10cm.
Among many other brands, these brands in some types using a 2.5mm jack: Palm One Treo, Sony Ericsson, Dopod, HP iPAQ, Motorola, O2 XDA, Siemens, QTEK, Xphone, Mitac Mio, FOOD, Léveno.
Ensure that your device uses a 2.5mm jack to buy this adapter.