1. Function: Mini Adapter Board, 2. Direct Plug-In Without Welding 3. Onboard: Passive Buzzer 4. The Golden Finger Of The Micro-Bit Motherboard Has A Number On One Side And Corresponds To The Silk Screen Insertion Of The Expansion Board. 5. Direct Plug-In Model Requires No Welding Type: Expansion Board Model: Horizontal Adapter Board Note:Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use Colour:As Shown Material:PCB + plastic Package Contents: 1 x Horizontal Adapter Board 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.