Material:Made of ABS Material,light weight and portable to carry outside, handheld device. Graphic LCD screen display:An airsoft chronograph with accuracy that gives you the most exact detailed readings; Compact in size, so this chronograph can be taken anywhere. Extra large size diameter: 25mm. You can even measure the velocity of paintball. Function - Shooting chronograph is a great way to measure your airsoft guns power ince many barrels have twists/ inch rifled inch and the handle needs to spin! Perfect for rate of fire, muzzle velocity, power of joule and prediction distance. 1/4 inch standard adapter interface for tripod mount.The testing must be carried on under a safe environment to prevent yourself and others from hurting by the shooting. Overview: Popular amongst the airsoft community, Our shooting chronograph is capable of calculating your muzzle velocity, power of joule, prediction distance and rate of fire. Graphic LCD display, great controls and compact size. It's accurate with readings and joule ratings. Specifications: Color: Black Material:ABS Net Weight: 200g Size: 13 x 9.5x 4.5 cm / 5.12 inch x 3.74 inch X 1.77 inch Testing Method: Handle Test/Triped Test. Firing Speed: 0-3600 b/m(0-60 b/second) Muzzle Velocity: 15-800 m/s(50-2600 feet/second) 1M High Firing Horizontal Range: 0-400 meters(0-1250 feet) Firing Kinetic Energy: 0-500J Testing Error less than equal 1.3% Voltage: DC 4.5V(3xAAA Batteries,not included) Temperatures Of Working Conditions: -10 Celsius to +50 Celsius 1/4 inch standard adapter interface for tripod mount Package Contents: 1 * Speed Tester Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.