This drive is an upgraded version of the TB6600, the breakdown of heightening to 32 segments, for high segmentation purposes. Applicable : 42,57,86 type of 2-phase 4-phase (4-wire 6 wire line 8) 9V-42V DC power supply; H-bridge bipolar constant-phase flow-; the maximum output current of 4.0A eight optional; up to 32 segments of six kinds of sub-modes available; the input signal is high-speed optical isolation; standard common anode single interface; offline hold function; semi-enclosed chassis can accommodate more demanding environment; energy semiautomatic current lock function; built-in thermal protection and overcurrent protection. colour:black Material:plastic Package Contents: 3 * motor driver Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real . The measurement allowed is +/- 1-3cm.