Adapter Terminal Block: Easy installation, Convenient for external power supply, save time and cable connection. 28BYJ-48 Stepper Motor: It is a kind of mechanical and electrical device that converts electrical pulses into angular displacement. The connected cable can be inserted and used directly. ULN2003 driver board: 5-wire 4-phase drivers can be used for ordinary ULN2003 chip drivers. Connect the 2-phase driver board and support the development board. with working indicator: A, B, C, D 4-phase LED shows the status of the stepper motor work. Colour:Photo Color Material:plastic Package Contents: 5 x 28BYJ-48 stepper motor 5 x ULN2003 Driver Board 5 x plug adapter terminal block 1 x 40-pin jumper wire Only the above package content, other products are not included. Note: Light 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.