Fx Wireless chronograph

Happy Sunday
hi guys
Im having problems with my wireless chrony is not reading is connected to the phone and is unable to read the shoots.
Was working perfectly last when I get it back on May from local gun shop. I noticed it it was having problems reading, sometimes random skipping one shoot.
Sadly today is not reading nuts.
It looks like is the oldest generation anyway was wondering if is a way to reset or something.
Was thinking to contact Fx but I can’t find the receipt. Please help🙏

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I have an earlier model and have had issues with it. Fresh batteries help, but it still misses about 20% of my shots. For some pellet/airguns it misses more, making it almost unusable.

I see another member recommending lithium batteries, I'll have to try that because I'm very close to buying a new chronograph.
I know is very frustrating
 
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