Specification: _x005f_x000D_ Origin: Mainland China _x005f_x000D_ Type: Module _x005f_x000D_ Condition: New _x005f_x000D_ Power supply: 2.2V to 3.6V _x005f_x000D_ Working voltage: 3.3V _x005f_x000D_ Logic level: 3.3V _x005f_x000D_ Installation hole diameter: 2 holes, diameter 3mm _x005f_x000D_ Integrated 802.11 BGN WiFi transceiver _x005f_x000D_ Integrated dual-mode Bluetooth-Compatible _x005f_x000D_ 4MB flash memory _x005f_x000D_ Maximum serial port baud rate: 25600bps _x005f_x000D_ Product size: 50.00x26.00x3.00mm _x005f_x000D_ Product size: 1.97x1.02x0.12inch _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ Note: _x005f_x000D_ 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! _x005f_x000D_ Please allow 1-2cm measuring deviation due to manual measurement. _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ Included: _x005f_x000D_ 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.