The product is an 8-24V drive module, which is mainly used for intelligent robots, large mechanical arms, 3D printers, printing machines, electric surfboards, electric skateboards, etc. Note: 1. Due to manual measurement, the size may be slightly different. Thank you for your understanding. 2. Due to different light conditions and different monitors, item color displayed in photos may be showing slightly different from real object. Specifications: Type: ODESC3.6, Without Heat Sink / ODESC3.6, With Heat Sink / ODESC V4.0, With Heat Sink ( Optional ) Color: Black Material: Electronic Components PCB Layers: 4 Layers Applicable Voltage: 8-24V Current: 50A Continuous / 120A Max Type Driver Board Size Packing Size Net Weight Gross Weight ODESC3.6, Without Heat Sink 6*5*1.5cm / 2.36*1.97*0.59in 16*6*2cm / 6.30*2.36*0.79in 56g / 1.98oz 56g / 1.98oz ODESC3.6, With Heat Sink 6*5*2cm / 2.36*1.97*0.79in 16*6*2.5cm / 6.30*2.36*0.98in 78g / 2.75oz 78g / 2.75oz ODESC V4.0, With Heat Sink 6.5*5*2cm / 2.56*1.97*0.79in 17*6.5*2.5cm / 6.69*2.56*0.98in 80g / 2.82oz 80g / 2.82oz Package List: 1 * Driver Board ( with Wires )