Catalog > Consumer Electronics > Kits > DIY Kits Twin Motor Gearbox Kit Twin Motor Gearbox Kit EK-KNS GEARBOX KIT TWIN MOTOR GEARBOX KIT , OPERATES ON 3VDC , 3 GEAR RATIOS AND OUTPUTS , 1:60 .....200RPM , 1:120 .....100RPM AND 1:288.....42RPM Discontinued Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE Features Two motors and gear sets to have wheels running in different directions.3 kinds of gear ratios and outputs for you to choose from.Gear Ratio : Output1:60 - 200 RPM1:120 - 100 RPM1:288 - 42 RPMOperates on 3 Volts DCWheels, tires and all other necessary parts included.Easy to follow instruction manual includedNOT SUITABLE FOR YOUNG CHILDREN, SMALL PARTS ,CHOKING HAZARD