Features: Features FH4 chip with 32 bit RISC V single processor, 160MHz frequency, integrated for 32 bit single operational, delivering strong computing power for application. Support 2.4GHz WiFi and Bluetooth-compatible 5.0, equipped with ceramic antenna and connector for stable signals in wearable devices. Miniature thumb sized board with single sided layout, sleep power consumption of 43μA, ideal for wearables and embedded projects with space constraints. Provides 11 GPIOs, 1 I2C, 1 SPI, onboard reset/boot buttons, and Type C port for flexible sensoring connection in diverse development scenarios. Integrates 128/256 and hardware accelerators for data security, perfect for home, and hardware projects from beginner to advanced levels. Specifications: Component:ABS Size:Approx.24x18mm/0.94x0.7inch Main frequency: 160MHz. Package Includes: 2 Optional Package: Package 1 Include:1Pc Development Board Package 2 Include:3Pcs Development Board Package 3 Include:5Pcs Development Board note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.