Instead of a L293D driver, we now have the TB6612 MOSFET driver: with 1.2A per channel and 3A current capability. It also has much lower voltage across the motor so you torque out of your batteries, and there are built-in flyback diodes as well. Tested compatible For , For , For ADK/ R3, For Due, For Diecimila & Duemilanove. Completely stackable design: 5 address-select pins means up to 32 stackable : that's 64 steppers or 128 DC motors! Colour:Photo Color Material:Plastic + Metal Package Contents: 1 x Motor drive module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.