KHRacing Multi-Checker TYPE1, using single AA batteries. ・Speed measurement, magnetic force measurement, and voltage measurement are possible. ・Instruction manual included. ・Automatically turns off after a set time. ① Speed Measurement 　Displays speed by placing the roller against the rotating tire. 　Features motor RPM calculation and display. 　By setting the gear ratio and tire diameter, the motor RPM can be calculated and displayed from the speed. ② Magnetic Force Measurement 　A magnetic force meter specifically for Mini 4WD motors. ③ Voltage Measurement 　A voltmeter specifically for MS Flex chassis. Other chassis can also be used with some modifications. ④ Stopwatch function Many users have achieved good results in official races using our checker. ■ Notices Basically, shipping may not be possible on Sundays and holidays. ■ Product Description ・The speed measurement range is approximately 100 km/h in a simulated confirmation environment. ・Voltage measurement is exclusively for MS Flex chassis. For measurement with other chassis, please extend the cables, etc., and make the necessary adjustments. ・The maximum measurable voltage is 3.3V. Even with fully charged alkaline batteries, it's around 3.2V. Measurement of higher voltages is not possible. ・Magnetic force measurement is for motors that can be used in Mini 4WD official rules. ・Please compare magnetic force values within your own checker. 　Comparisons with other companies' products or even different units of the same checker may not be accurate. ・It's not made with a personal 3D printer, but by a professional, so it feels good in your hand. The layering surfaces are not visible. ・Battery life ・Current speed only display mode (displayed in large characters) ・Displays the maximum speed and current speed from power-on in two lines (second screen) ・Switching is done with a switch. ■ Important Notes ・This is a product created by an individual. Please do not expect the quality of a commercial product. ・All use is at your own risk. ・This is a product created by an individual. Please be careful. We are not responsible for any fire, injury, etc. All use is at your own risk.