See also:

HSA On Automatic Transmission Vehicles
The system will work in REVERSE, and all forward gears on vehicles equipped with an automatic transmission. The system will not activate if the vehicle is placed in NEUTRAL. ...

Replacing The Batteries
Each set of headphones requires two AAA batteries for operation. To replace the batteries: • Locate the battery compartment on the left ear cup of the headphones, and then slide the battery cov ...

Vehicle Modifications/Alterations
WARNING! Any modifications or alterations to this vehicle could seriously affect its roadworthiness and safety and may lead to a accident resulting in serious injury or death. ...