Competition Electronics took all the best parts of our 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 our 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) Features: Low power BLE Bluetooth connectivity for connection to mobile devi Mfg: Competition Electronics