1. Blackberry Trackball Sensor, 360° Trackball Module 2. VCC Uses 3.3V Or 5V Power Supply 3. The Four Directions Of Up, Down, Left And Right And The Button In The Middle Can Be Combined For Identification. 4. Four Types Of Led Lights: Red, Green, Blue And White, Which Can Be Controlled Separately 5. 20X28mm Size, Portable Use Instructions For Use 1. Connect To The Development Board Through The 11pin Header. Vcc Can Be 5v Or 3.3v. 2. Fon Up Down Lef Left Rig Right SW1 Middle Button. These 5 Pins As Key Inputs And Are Connected To The Microcontroller 3.Red Red Green Blu Blue White. These 4 Pins Are Used As The Output Of The Microcontroller. The High-Level Light Is Off And The Low-Level Light Is On. 4. After Connecting, Write A Program On Your Own Development Board. Overview The Trackball Module Is Designed And Manufactured Using The Blackberry Trackball. The Module Can Drive The Rotating Shafts In The X And Y Directions Through Roller Motion. It Rotates Through The Multi-Pole Magnetized Magnets Fixed On The Rotating Shafts And Sends Signals To The Corresponding Smd Hall Elements To Determine The Movement Trajectory. . A Small Smd Switch Is Also Designed Below The Trackball To Facilitate Users To Trigger Events Or "Click" Selections. Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Not Affect The Use Colour: As Shown Material: PCB+Plastic+Metal Package Contents: 3 x Blackberry Trackball Sensor Module 3 x Single Row Of Pins (11Pin) 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 picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.