Features: Fully compatible with Windows 7 and Windows 8 systems, resolving instability issues found in traditional UNOR3 boards. Easy driver installation, especially on 64-bit Windows 7 systems. Simple and convenient program download. Connect various sensors and electronic components such as LEDs, buzzers, buttons, and photoresistors to create a wide range of projects. Equipped with pin sockets for easy connection using DuPont wires. Features an upgraded 16u2 chip, reducing cost while maintaining performance. Built with a high-speed microprocessor controller (ATMEGA328), offering a user-friendly development environment ideal for beginners. and high quality Specifications: Type: without cable, with cable (optional) Digital I/O pins: 0–13 Analog I/O pins: 0–5 Supports ISP programming Input voltage: USB powered from computer; external power supply 5V–9V DC Output voltage: 5V DC and 3.3V DC Microcontroller: Atmel ATmega328 Note: No retail packaging. Allow 0–1 cm error due to manual measurement. Please confirm you accept this before purchasing. Due to differences in monitor displays, the actual color may vary from the image shown. Package includes: 1 x UNOR3 Development Board