Features:
Convert a 2.5mm stereo audio jack to a 3.5mm jack.  This adapter allows you to use headphones and audio cables 3.5mm connectors with devices that have a 2.5mm jack.  Gold plated connectors provide optimal signal transfer.
Features and Specifications

Specifications:
Connectors: 2.5mm Male to 3.5mm Female
Net Weight: 2.2g

Package Content:
1 x 2.5mm Male to 3.5mm Female Audio Video Plug Adapter