Competition Electronics Pocket Pro Blue. A timeless design that has set the standard for shot timers. Requires one 9 volt alkaline battery for operation. Review up to 50 shots- forward or reverse Ergonomic design allows right or left hand operation without covering the buzzer and sensor Saves batteries with automatic power down after 10 minutes of inactivity Large display with .5 inch tall numbers Displays time to 199.99 seconds Adjustable sensitivity Direct review of shots split times and shot number Par time for a insecond beepin to indicate a time limit Switch selectable instant/random delayed start Large clothespin style belt clip fits over your shooting belt. Separate shot sensor and buzzer Low battery indication made in specialized factories with real service and support Specifications for Competition Electronics Pocket Pro: Manufacturer: Competition Electronics Color: Blue Battery Type: 9v Height: 1.5 in Width: 3.125 in Package Type: Box Length: 4.25 in Additional Features: 50 Shot Capacity 1500 Hz Buzzer Output Condition: New Package Contents: Competition Electronics Pocket Pro Competition Electronics CEI- 2800: Pocket Pro Blue