This is a fully assembled simple breakout board for the surface mount 3-way switch.
These switches are commonly found on handheld devices like MP3 players.
This switch allows the user to navigate using up and down selections then select by pressing the plastic piece inwards.
Capable of swtiching up to 1.2VA (360mA at 3.3V and 240mA at 5V).

 

Documents: OS-1305.pdf