• The TS4A is a US Patented resident air brake locking system applied to the yellow emergency brake knob in the vehicle.

• It requires no driver assembly to use as it is always on and ready to go by simply removing the unique key.

• The TS4A never wears out as it has no moving parts.

• The device can be retrofitted on any truck, bus, yard dog, fire engine or garbage truck with air brakes from 1988.

• The device can be moved from vehicle to vehicle if your truck is sold.

• The device takes minutes to install and it can be done with the simple instructions provided.

• The TS4A can be keyed to any system including master and regional keys.

• The TS4A allows operators to secure their vehicle when unattended while leaving the engine running for heat or A/C.

• The TS4A cannot be circumvented or disabled without a tremendous effort, an exceptional amount of time and the availability of the proper tools and replacement parts.

THESE SECURITY DEVICES COME WITH ALL MOUNTING BRACKETS, TWO KEYS AND EASY-TO-UNDERSTAND INSTALLATION INSTRUCTIONS. PLEASE SPECIFY YEAR/MAKE/MODEL WHEN ORDERING.