Position/speed/torque closed-loop, it can run at high speed without losing step. Field-Oriented control, low noise, low vibration and low calorific. 4 Half bridge driver with 8 MOSFET, high operating efficiency. 14 Bit magnetic encoder, high angle resolution. Support 1-256 subdivision,odd subdivision is also avaible.(Such as 11 subdivision) Material: plastic Color as shown Maximum speed 1000RPM.Support motors with 0.9 degree or 1.8 degree . The maximum printing speed can reach 150-180mm/s and easy to install and wire. With USART interface, you can connect the computer by serial port, for parameter adjustment and query. Specification: Board Type: MKS SERVO42C V1.0 Microprocessor: Crotex-M0+ Input Voltage: 7V-28V Encoder: 14 Bit Magnetic Encoder Adjustable Current Range: 0-3000mA Subdivision:1-256(Default 16) Maximum Speed: 1000RPM Angle Resolution: 0.08 degree The Frequency of Update: Position 10Khz / Velocity 10Khz/ Torque 20Khz PCBA Size: 39x35.8mm /1.54x1.41in Package Contents: 2 x Stepper Motor Set 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.