This 2.5mm TRS miniature connector is commonly used on cell phones and small electronic devices. 2.5mm connectors are slightly smaller than 3.5mm head phone connectors, but look identical.

Features:

2.5mm stereo male connector
Solder type
Metal handle with strain relief
Durable

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Q&A

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Audio Connector Guide
Connector Type	Picture	Explanation and Uses
TS ( Mono) Plug (Male)		This is a TS or mono plug (note the single stripe on the connector) This provides single channel analog audio.
TRS (Stereo) Plug (Male)		This is a TRS or stereo plug (note the two stripes on the connector) This provides a stereo or 2 channel analog audio. Commonly found on headphones
TRRS Plug (Male) 4 Conductor		This is a TRRS 4 conductor plug (note the 3 stripes on the connector) This can provide 2 channel audio plus a microhone. Also capable of 2 channel audio and a video feed. This is commonly found on iPhone headsets and portable DVD players.

Specification

Features & Specs
Form factor	The form factor of this connector?	Straight
Style	The style of this connector?	Solder
Gender	The gender of this connector?	Male
Conductor Material	The material the conductor is made from?	Nickel Plated Brass
Housing Material	The material this body is made from?	Metal