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1. Internal Battery Level Indicates the charge level of the internal battery.
2. Error LED Illuminates Red if reverse polarity is detected, or blinks "On"
and "Off" when the internal battery temperature is too high.
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3. Power Button Push to turn unit "On" & "Off".
4. Power LED Illunimates White when unit is "On".
5. Boost LED Illuminates White when Boost is active. If the unit is
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connected properly to a battery, the GB150 will automatically detect a
battery and go into Boost mode (LED flashes White when Manual Overide
feature is active).
6. Manual Override Button To enable, push and hold for three (3) seconds.
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WARNING: Disables safety protection and manually forces Boost "On".
Only for use when a battery is too low to
be detected.
7. Light Mode Button Toggles the ultra-bright LED light through 7
light modes: 100% > 50% > 10% > SOS > Blink > Strobe > Off
8. Voltmeter.
The built-in voltmeter reads the voltage of the vehicle's battery for enhanced
diagnostics and troubleshooting. The voltmeter will automatically read the
voltage of any battery (or battery system) when the battery clamps are
connected, even if the unit is powered off. The voltmeter will read voltage
between ~3V and ~20V. If the connected battery is below 3V, nothing will
display. If the voltage is that low, there is likely a load(s) on the battery, such
as headlights or and AC fan, that should be shut off before attempting to start
the vehicle.