Asus E420 User Manual page 9

BIOS key
Before booting up the system, insert a straightened paper
clip into this hole to enter the BIOS.
USB 3.1 Gen 1 port
The USB 3.1 Gen 1 (Universal Serial Bus) port provides a
transfer rate up to 5 Gbit/s and is backward compatible to
USB 2.0.
Microphone jack
The microphone jack is designed to connect to a
microphone used for video conferencing, voice narrations,
or simple audio recordings.
Headphone jack
This port allows you to connect amplified speakers or
headphones.
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