Jensen BT-390 - Manual (Page 10)

2. Installation
q Preparing the remote control
The control module is designed to attach to the inside of the
steering wheel on the left or right side.
Installing the battery
Before attaching the control module, install the supplied
battery.
1. Remove the battery cover from the rear of the control
module.
2. Insert the new battery with the correct polarity as shown
below.
3. Put the battery cover back on.
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