1. Improve your electronics skills with our comprehensive DIY calculator kit, perfect for both academics and experienced hobbyists 2. LED Display: Clear and bright display for easy viewing of calculation results 3. Soldering Training: Master detailed instructions for soldering microcontroller units 4. Electronic Assembly: Learn the basics of electronic components and their assembly 5. Soldering Project Practice: Improve your soldering skills through hands-on practice Product name: MCU LED calculator kit Chip: STC8G1K17+TM1638 Digital display: 7-digit display (8-digit LED digital tube) Power supply: 2 AAA batteries (3V) (batteries not included) Colour: As Shown Material:plastic Style: C Green display Tips: The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Package Contents: 1 * DIY Calculator Kit 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.