1. Miniature ATtiny85 microcontroller
2. Wearable
3. Dimensions: Diameter 25mm
4. CJMCU-ATTINY85 miniature microcontroller development board
5. 8K Byte of In-System Programmable Program Memory Flash
6. 512 Bytes In-System Programmable EEPROM
7. 512 Bytes Internal SRAM