There is a switch that can select the brand of brake fluid,
it can detect 8 different kinds of brake fluids separately andprecisely test the water content in the brake fluid.
Features:Design to test brake fluid DOT 3, DOT 4, DOT 5.1, ACDelco DOT 3, PENNZOIL DOT 3, Prestone DOT 3,
MotorcraftDOT 3, and Toyota DOT 3.With CE and RoHS Approval.Battery (included): one 1.5V, type AAA