and high qualityMade of high quality , more durable.Low noise, useDC 5V 4-phase + for driver test module boardA, B, C, D four-phase indicate the working state of the with standard interface for direct insertionRated voltage: DC5V 4 phaseStep angle: 5.625 x 1/64No load absorption frequency: 600HzNo-load extraction frequency: 1000HzPulling : 34.3mN.m (120Hz)stop : 34.3MN.mDC resistance: 200Ohm7% (25C)Insulation resistance: 10Mohm (500V)Dielectric strength: 600V AC / 1mA / 1sEdge rating: ATemperature rise: Less than 40K (120Hz)Noise: Less than 40dB (120Hz, no load, 10cm)Colour:As shown:Plastic + MetalPackage Contents:5 x 28BYJ-48 5 x ULN2003 motor driver board(Due to different batches, the appearance may be different, the function is the same)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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.