This is an optional product and not required for operation of the main product

Precision chargers can even wake dead 12-volt lithium (LiFePO4) batteries from standby automatically

External unit 12/24V

15/32" L x 15/32"-32 mounting stem

An excellent choice for ground tackle

Ritchie - TR-31 Trek Bracket-Mount Compass , Part No TR-31, Color Black Marine Refrigeration This is an optional productIdeal for Runabouts Center Consoles, Ski Boats, Flats Boats, Bass Boats, Cars, Trucks, RV's and ATV's 21 4" Direct Reading Dial with Large Numerals for Easy Reading Black with Black Dial, Bracket Mounted Strong Directive Force Magnets and Composite Dial for Fast Performance Built in Compensators to Correct for Deviation Extra Large Diaphragm and Rugged Construction ProvideExtended Operating Temperature Range High Impact Rubber Accent Strip Built in 12