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. ・The three black switches may sometimes be white. ① Speed Measurement 　Displays the 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. Many users have achieved good results in official races using our checker. ■ Information Basically, shipping may not be possible on Sundays and holidays. ■ Product Description ・The speed measurement range is approximately 100 km/h in a simulated testing environment. ・Voltage measurement is exclusively for MS Flex chassis. For other chassis, please extend the cables, etc., to accommodate. ・The maximum measurable voltage is 3.3V. Even with fully charged alkaline batteries, it's around 3.2V. Higher voltage measurements are not possible. ・Magnetic force measurement is for motors that can be used in Mini 4WD official rules. ・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. ・This is not made with a personal 3D printer, but by a professional, so the feel is good. 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 image) ・Switch between modes using the switch. ■ Important Notes ・This is a product made by an individual. Please do not expect the quality of a commercial manufacturer's product. ・All use is at your own risk. ・This is a product made by an individual. Please be careful. We are not responsible for any fire, injury, etc. All use is at your own risk. 2