Features: Local features and simple operation:1: design of four sides of the , effectively alleviate the impact of flow test. Improved stability and accuracy. The displasurface and the operation buttons are in front, and it is very convenient to operate and view the test data. 2 small size Lengthxwidthxheight of 130X72MM portable. 3 high speedprecision. As thegun with highprecision and clamp rail, and fixed equipment after the forpath every fortime are the same, and with guide rail can be madewiththe miningmodel inparallel, so the measurement result error is small, small fluctuation dynamic error. 4 more functional. Not only can measure the speed, but also can measure kineticenergy, and can record up to 40 sets of speed and kineticenergy value of the 40 groups. 5 multiple power management and forprotection. The lithiumbattery has the function of over charging, over discharge and short circuit forprotection. At the same fortime, the instrument integrates the intelligentshutdown and the low power off function. Intelligentshutdown function is turned on bydefault, you can set off this feature 6 simple operation. Test the initial speed can betested without any settings and adjustments! Specifications: Material: Acrylic Operating voltage: DC3.7V (built in lithiumbattery) Working environment temperature: -10 ~ +60 Accuracy: test error is less than or equal to 1% Speed MeasurementRange: 1-2000m/s(4-6500FPS) Energy MeasurementRange: 1-2000J Weight inputrange 0.1-10G Speed record:40 group Kineticenergy recording:40 group Exteriordimension:130X50X72mm(long XwideXHigh) Note: Item color displayed in photos may be showingslightly different on your computermonitor sincemonitors are not calibrated same. Please allow 1-3mm slight deviationdue to manual measurement. Thank you Package includes: 1x Shooting Speed Tester 1x Ushaped Clamp 1x USB Cable