Asus Transformer 3 Pro T303UA - Manual (Page 18)

18 ASUS Tablet and ASUS Keyboard Dock E-Manual
Left Side
MicroSD card slot
This built-in memory card reader slot supports microSD and
microSDHC card formats.
Volume button
Press this button to increase or decrease the volume.
Headphone/Headset/Microphone jack
This port allows you to connect amplified speakers or
headphones. You can also use this port to connect your headset
or an external microphone.