Features: ATTINY88 chip equipped: Equipped with ATTINY88 chip, it provides powerful processing capability and rich interfaces resources. 3.0 Improved Board: Adopting the 3.0 version of improved board design, it is more stable in function and strong in performances, suitable for various application scenario. Expansion Board Functions: With rich expansion board functions, it supports a variety connections, making it easy for users to achieve customised expansion and development. Multi-functional interfaces: support a variety of interfaces, such as GPIO, UART, I2C, etc., which is convenient for users to connect and control different types of peripherals. Strong stability: Stable and reliable design ensures stable operation effect, suitable for long time operation and various engineering application scenario. Specifications: Item: ATTINY88 Microcontroller Development Board Size：about 9cm/3.54in Equipped: ATTINY88 Chip Quantity：10PCS Package Includes: 10PCS ATTINY88 Microcontroller Development Board note: Due to the problem of lighting effects there is certain tolerances in product, please understand. Please allow 0-1cm error due to the measurment.