Specification: Origin: Mainland China Type: Module Condition: New Power supply: 2.2V to 3.6V Working voltage: 3.3V Logic level: 3.3V Installation hole diameter: 2 holes, diameter 3mm Integrated 802.11 BGN WiFi transceiver Integrated dual-mode Bluetooth-Compatible 4MB flash memory Maximum serial port baud rate: 25600bps Product size: 50.00x26.00x3.00mm Product size: 1.97x1.02x0.12inch Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement. Included: 1 x Development Board 1.Wireless Connectivity: Experience the freedom of wireless internet with our Development Board. Its wireless connectivity feature ensures you remain connected, enabling you to browse and stream content freely, without the constraints of cords or cables. 2.Bluetooth-Compatible Enabled: Our Development Module is equipped with integrated Bluetooth-Compatible technology, allowing for easy connection with various wireless devices. Be it Bluetooth-Compatible headphones, speakers, or other gadgets, seamless pairing is just a tap away. 3.4MB Flash: Equip your projects with ample storage space with our Wireless Development Board that comes with 4MB Flash memory. This enhances the overall performance and ensures smooth operations, improving your user experience. 4.Lithium Battery Interface: Our Dev Board features a lithium battery interface that supports a maximum charging current of 500mA. It ensures efficient and swift charging, minimizes downtime, and keeps your device powered for extended periods. 5.Default Firmware-AT Firmware: Our Development Module Board comes preloaded with the dependable AT firmware. This firmware simplifies the user interface, offering easy-to-use features, and negating the need for complex configurations or settings.