Features1. Standard Raspberry Pi 40PIN GPIO extension header, supports Raspberry Pi series boards, Jetson Nano 2. Onboard dual HR8825 motor controller IC with built-in microstepping indexer, drives two stepper motors, easy to use 3. 6 available microstepping modes, configured with the DIP switches: full-step, half-step, 1/4-step, 1/8-step, 1/16-step, and 1/32-step 4. Adjustable motor drive current via potentiometer, maximum 2.5A current output 5. Protection features: Overcurrent Protection (OCP), Thermal Shutdown (TSD), VM Undervoltage Lockout (UVLO) 6. Integrates 5V regulator, allows providing power to Raspberry Pi 7. Onboard multi connector options for stepper motors in different specifications 8. Comes with development resources and manual (examples in BCM2835, wiringPi, and python)Specifications1. Motor controller: HR8825 2. Motor drive voltage: 8.2V~28V 3. Motor drive current: 2.5A 4. Logic voltage: 3.3V 5. Mounting hole size: 3.0mm 6. Size: 65 x 56mmPackage List1. Stepper Motor HAT (B) x 1 2. RPi screws pack (2pcs) x 1 3. Aluminum heatsink x 1Specification: Package Weight One Package Weight 0.06kgs / 0.14lb One Package Size 15cm * 12cm * 3cm / 5.91inch * 4.72inch * 1.18inch Qty per Carton 200 Carton Weight 14.00kgs / 30.86lb Carton Size 46cm * 32cm * 32cm / 18.11inch * 12.6inch * 12.6inch Loading Container 20GP: 566 cartons * 200 pcs = 113200 pcs40HQ: 1314 cartons * 200 pcs = 262800 pcs