Item Type: Driver board + stepper motor Rated Voltage: DC5V 3C Rated Voltage Range: DC 36V or less Rated Power: 5W Pull-in Frequency Without Load: 600Hz* Step angle: 5.625 x 1/64 No-Load Pull-out Frequency: 1000Hz Traction Torsion: = 34.3mN.m (120Hz) Braking Torsion: = 34.3mN.m DC Resistance: 2007% (25C) Insulation Resistance: 10M (500V) Dielectric Strength: 600V AC / 1mA / 1s Temperature Rise: +40K (120Hz) Noise: +40dB (120Hz, no load, 10cm) Package List 4 x Driver Board 4 x Stepper Motor 15V 4 phase reduction stepper motor 28BYJ-48 is with ULN2003 driver board. 2The driver board has A, B, C, D four-phase LEDs, used to indicate the working state of the stepper motor. 3Stepper motor with standard interface can be directly plugged in and used, wear-resistant and reliable. 4With excellent mechanical stability, driver board can directly replace the old or damaged parts to improve stepper motor's performance. 5And stepper motor and its driver board installation is simple, not requires particularly complicated operations.