HOW TO USE
1. Turn the Speedster III “ON” by pressing the power button on the back of the unit, underneath
the LCD display.
2. Aim the Speedster at your target, then press and release the trigger button on the handle once. A
“radar” icon ( ) will appear in the upper right hand side of the LCD display, and the Speedster will
start reading the current speed of whatever it is pointed at, updating the display constantly as the
target’s speed changes. For best results with maximum accuracy, keep your target’s direction of travel
in a direct line to you (moving straight towards or away from) and not perpendicular (at an angle) to
you. Press and release the trigger again when you are finished measuring the speed of your target.
The radar icon is no longer shown on the display, and the display indicates the highest speed that was
measured between the first and second press of the trigger. To check the speed of the target again
(or after aiming at a new target), repeat the process.
3. Turn the Speedster “OFF” by pressing the power button underneath the LCD Display for 3 seconds
or until display shuts off.
NOTE: The Speedster has an automatic shut-off feature to extend battery life. After 10 minutes of
inactivity, the Speedster will automatically power off.
When a battery symbol appears on the lower right hand corner of the display, this indicates that
battery voltage is low and new batteries should be inserted. Remove the batteries when storing your
Speedster for a long period.
TARGET SPEED ACQUISITION
A target can be anything that is moving faster than 10 MPH. To acquire the speed of a target, with
the Speedster III powered on, aim the Speedster III at the target and depress the trigger. An icon will
appear in the upper right corner of the LCD display. This indicates the Doppler Radar is functioning.
The radar will continue to be active searching for speed until the trigger is released. Upon release of
the trigger, the fastest speed captured within that series will automatically be displayed. The speed of
the target will appear on the LCD display in MPH.
There are certain mathematical properties of Doppler Radar that affect the accuracy of your Bushnell
Speedster III. Please read “COSINE EFFECT ON TARGET VELOCITY” below. To ensure optimum
accuracy, remember to keep your targets direction of travel in a direct line with you, and not
perpendicular.
