Cannot reccomend - ATN Laser Ballistics 1000 Rangefinder w/ Bluetooth

I bought this in April 23' and set up with my Thor 4. Now that Hunting season is here I unit does not want to work. Testing it to within 50 yds. it showed ranges around 200 yds. And this with only having used the rangefinder around half a dozen times.
I do own a ABL 100 which is on my 4K Pro 5-20 and that appears to function.