The Competition Electronics ProTimerBT shot timer with built-in Bluetooth and numerous feature enhancements has taken all the best parts of the Pocket Pro II design and added improvements to make the ProTimerBT the most sophisticated timer on the market. Now you can get more useful practice session information with the simple built-in user interface, or the PTLink mobile app. You have the flexibility to collect and review all your shot data at the range right from the timer display and import it to the PTLink app at any time. You can even add notes and attach a photo of your targets to each shot string. Requires one 9volt alkaline or lithium battery for operation (not included) for 25 hours of operation.Operating Temperature: 30-110 degrees FahrenheitAccuracy: +/- .01 secondsMax # of Shots Per String: 70Max # of Strings in Memory: 50Max # of Rounds per Minute: 1800Max # of Par Time Beeps: 5Start Delay Range: .1 to 9.90 secondsMax Time Limit: 199.9 seconds before wraparoundFeaturesLo...