GLOBALSAT GB-580 Quick Start - Manual (Page 20)

How to Upgrade Firmware
[MAIN MENU] > [CONFIGURATION] >[SYSTEM UPGRADE]
1. Allow you to upgrade the firmware of
GB-580.
2. If you want to cancel the upgrade
process, press Power + ESC button at the
same time.
Heart Rate Sensor Installation Procedure
(Only for GB-580P)
Wear the Heart Rate Monitor
Outer side
Heart rate sensor Transmitter
Heart rate sensor
Inner side
Moisten this side to your skin. You can wet the sensor to obtain a better
reception of your pulse.