Features: 1. Specifically Designed And Manufactured For Solderless Experiments On Electronic Circuits. 2. Since Various Electronic Components Can Be Plugged In Or Out As Needed, Welding Is Eliminated And Circuit Assembly Time Is Saved, 3. Components Can Be Reused, So They Are Very Suitable For Assembly, Debugging And Training Of Electronic Circuits. 4. Recyclable And Environmentally Friendly; The Structural Color Is Clear And Easy To Use. 5. Can Be Assembled Into Fixed Units Two Terminal Blocks: 1260 Holes Four Distribution Strips: 400 Holes Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use size: About 21.5 x 13cm Material: ABS+aluminum colour: As shown Package Contents: 1 x Breadboard (Excluding Jumper Cables) 3 x Connectors (Random Colors, Cannot be chosen the specific color.) 4 x Installation Accessories 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.