The RFID learning suite is the entrance to the main suite upgrade. The main updates include: 1. 1602 I2C 1602 has been replaced with screen control for more convenience. 2. RFID module and RFID keychain and white card, 3. Added DS1302 clock module, 4. Added sound detection module, Added temperature and humidity module, Added water level detection module 5. Added keyboard module.Added 8x8 dot matrix module Kit Upgraded RFID Stepper Motor Learning Kit (The color and shape of accessories are random, Cannot be chosen the specific color and shape.and do not affect use) Material: abs colour: As Shown Package Contents: 2 x for R3 development board kit (improved version) 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.