Tamiya 70110 4-Speed Crank-Axle Gearbox Kit ESP32/ESP8279 It even supports SD module

It even supports SD module card which provides the ultimate functional expansion for Arduino so far

it enables longer ranging distance

Please do not plug the sensor which on the module

see the Zumo 32U4 Robot (Assembled with 100:1 HP Motors)

Tamiya 70110 4-Speed Crank-Axle Gearbox Kit ESP32/ESP8279 It even supports SD moduleThis gearbox has four possible gear ratios, including the highest gear ratio of Tamiyas gearbox series, 5402: 1. The other options are 126: 1, 441: 1, and 1543: 1. This gearbox also features a worm gear, which locks the output shaft when the motor is not turning. Overview The Tamiya 4 speed crank axle gearbox has four possible gear ratios, including the highest gear ratio of Tamiyas gearbox series, 5402: 1, as well as 126: 1, 441: 1, and 1543: 1. This