E9900-X Slingshot Speedometer Initial Velocity Tachymeter Bow Velocimetry Speed Meter with Tripod Description: 1.Instrument for measuring shot by pressure. Please distance from the test of a certain distance test (recommended distance of 0.5 meters). This prevents the dust in the air flow to affect the accuracy of the test. 2.Slingshot Tachometer Professional-level Speed Tachometer Arc Speedometer Factory Outlet / Non-E9900-x 3.This product on the speed of 1 to 999.9 meters per second high-speed moving objects with accurate speed capability. Effective sensing area, the use of extremely convenient. High sensitivity. Ambient light adaptability, indoor and outdoor day and night can use. Stable performance, high precision. Specification: 1.Working voltage: DC6V 2.Working environment temperature: -30 ~ +60 3.Accuracy: test error is less than 0.5% 4.Measurement range: 1-999.9 M/S (FPS range 30-999.9) 5.Outline dimension (main body) mm:330*80*44 6.Feature:Aluminum alloy shell/ stainless steel supportVelocity measurementenergymeasure / Speed energy key switch / Look at the record / view average value 7.Weight: 1KG Include: 1 x Slingshot Speedometer 1 x Tripod