Asus H81M-V3 User Manual page 27

7. Serial port connector (10-1 pin COM2)
This connector is for a serial (COM) port. Connect the serial port module cable to this
connector, then install the module to a slot opening at the back of the system chassis.
H81M-V3
H81M-V3 Serial port (COM2) connector
The COM module is purchased separately.
8. Speaker connector (4-pin SPEAKER)
The 4-pin connector is for the chassis-mounted system warning speaker. The speaker
allows you hear system beeps and warnings.
H81M-V3
H81M-V3 Speaker Out connector
ASUS H81M-V3
COM2
PIN 1
SPEAKER
PIN 1
1-19