Features:Brand new and high quality.Mechanical structure is simpleit is easy to install.This car is the tachometer encoder.With a 4 AA battery box.Can be used for distance measurementvelocity.Can use ..
Product description100% brand new and high qualityOperating voltage: 3V~12VDC (recommended operating voltage of about 6 to 8V)Maximum torque: 800gf cm min (3V)No-load speed: 1:48 (3V time)The load cur..
A simple mechanical structure, very convenient platform to build uponBy four deceleration DC motor with flexible turning providing good steering direction4 Wheel Drive for exceptional grip and control..
The metal strips and potato make a simple battery that creates electricity to operate to operate the clock. Each potato works as a device called a electrochemical cell. It converts the chemical energy..