Features: S3 is a low power system on a chip, which integrates 2.4GHz Wifi and low-power Bluetooth-compatible double mode wireless communication. s3 have a complete Wifi subsystem and low power Bluetooth-compatible subsystem, with industry leading low power performances. It supports a variety of low power working and can meet the power consumption requirements of various application scenario. s3 chip provides rich interfaces and have many unique hardware devices.Full mechanism. The perfect security mechanism enables the chip to meet strict security requirement. Ideal for developers, engineers, and enthusiasts high performances platform to build home devices, industrial automation systems. Perfect for prototyping wireless sensors networking, robotics controllers, or data logging applications requiring stable Wifi throughput and low latency communication. Specifications: Component:Metal Type:A/B Size:Approx. 62x28mm/2.44x1.10inch Package Includes: 1 Set 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.