1x 9 Volt batteries required (best with Polaroid 9 Volt batteries), Color is Blue ,configuartions of display ,automatic power turn down after 10 minutes of inactivity large clothespin style belt clip
Make sure you are using alkaline batteries. After 10 minutes, if no shots are detected and no buttons are pressed, the timer will power down automatically. To wake up the timer, press the SET/ON button
The timer can store up to 99 shots for a given timing cycle. Subsequent shots will be stored by overwriting the previous value of shot 99. Shot sensitivity is settable from the SHOT SENSITIVITY screen.
Increase the value for greater sensitivity decrease it for less sensitivity. To reset factory default values, remove the battery, then hold down the “Start” button and reinstall the battery.
Look at the display to see the message “INIT N/V MEMORY.” Now release the start button. The maximum timing period is limited to 199.9 seconds. Shots recorded after this will reflect the wrapped time.
The Pocket Pro II measures internally to a resolution of 1 mSec, but shot displays, splits, etc. are internally rounded to the nearest 10 mSec.
For this reason, RPM readings may appear to be inaccurate when manually calculated using the displayed shot string values. In reality, the RPM reading is actually more accurate than the manual calculation
since it is calculated using the internal shot times, which are measured with 1mSec resolution Should only be used in temperatures between 32110 degrees Fahrenheit, each Pocket Pro II If the above information does not address the issue