Features: It comes with a fully certified module on board featuring 2.4GHz 802.11n wireless LAN, making it the perfect solution for loT applications and projects requiring wireless communication. Dual-core Arm Cortex-M0+ processor, flexible clock running up to 133 MHz; 264kB on-chip; 2MB on-board QSPI flash; 2.4GHz 802.11n wireless LAN; Specifications: Material:ABS Size:Approx.5.1x2.1cm/2.01x0.83in 2.4GHz 802.11n wireless LAN 26 multifunction GPIO pins, including 3 analogue inputs 2 × UART, 2 × SPI controllers, 2 × I2C controllers, 16 × PWM channels 1 × USB 1.1 controller and PHY, with host and device support 8 × Programmable I/O state machines for custom peripheral support Supported input power 1.8–5.5V for DC Operating temperature -20°C to +85°C ; -20°C to +70°C Castellated module allows soldering direct to for carrier boards Drag-and-drop programming using mass storage over USB Low-power sleep and dormant modes Accurate on-chip clock Temperature sensor Accelerated and floating-point libraries on-chip Package Includes: 1x Development Board note: Please allow 1-2cm errors due to manual measurement,please make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.