GIGABYTE GN-A16B - Manual (Page 24)

GN-A16B Wireless Access Point User Guide
1 Beacon Interval
The beacon interval is the amount of time between access point beacon transmissions.
The default value for this interval is generally 100ms, that is 100 beacons sent every
second.You can increase the beacon interval and have lower overhead on the network,
but then roaming will likely suffer. It's best to leave this setting alone.
Verify the desired setting and then click the “Apply” button to set the value into access
point.