GPX SA118S - Manual (Page 7)

Operations
7
3
1 3.5mm Headphone Pin
Use the 3.5 mm Headphone Pin to connect an iPod shuffle (2nd Generation) or an
iPod nano to the unit.
2 Battery Compartment (Requires 2 AAA Batteries, not included)
3 Off/Mid/Hi Switch
Adjust the Off/Mid/Hi Switch to turn the unit off and on, and to adjust the speaker
volume between Mid and Hi.