Microcontroller: ATmega168 or ATmega328V
Operating Voltage: 2.7-5.5 V
Digital I/O Pins: 14
PWM Channels: 6
Analog Input Channels: 6
DC Current per I/O Pin: 40 mA
Power Supply: Operates from 2V to 5V
Automatic Reset: Supports automatic reset for easier programming
Flat Design: Completely flat back for easy integration

MCU: Powerful STM32F103C8T6
Performance: 72MHz work frequency
Memory: 64K flash memory, 20K SRAM
Voltage: 2.0-3.6V power, I/O
USB: Onboard Micro USB interface
Core: ARM Cortex-M3 32-bit CPU
Debug: SWD Mode support
Size: Compact 54mm x 22mm
Weight: Light at only 9g
Download Datasheet

Stackable Design: Easy to connect with ARDUINO.
Bluetooth Support: Enable wireless communication.
Power Output: Supports 3.3v and 5v.
Protocol: USB 2.0 compatible.
Software Support: X-CTU for configuration.

Portable Design: PCB installed inside aluminum alloy shell.
Interface Markings: Clearly marked for convenience.
Voltage Support: 5V and 3.3V available simultaneously.
Laser Engraved: Permanent clarity on shell text.
Motherboard Protection: 500MA internal resettable fuse.
SWIM Connection: Via pin header or 2.54 mm pitch connector.
SWIM Speed: Supports 9.7 Kbytes/s and 12.8 Kbytes/s.
Status LED: Red and blue indicators for device status.

USB-TTL Converter: Facilitates communication.
Logic Level: 5V compatibility.
Operating Supply Voltage: Stable 5V power.
Digital I/O Pins: 14 versatile pins.
Analog I/O Pins: 6 dynamic inputs.
WiFi Supported: 802.11 b/g/n connectivity.
Memory: Generous 8MB storage.
Micro USB: Convenient connection.