Specification: _x005f_x000D_ Origin: Mainland China _x005f_x000D_ Communication method: Zigbee _x005f_x000D_ Main functions: _x005f_x000D_ 1. First of all, a very important function is to use as a PacketSniffer, using cC2531 USB Dongle with ackn near er to grab wireless data packets, which is very helpful in the development of wireless protocols. _x005f_x000D_ For example, two CC2530S communicate with each other, but the receiving end always has no data. This requires the cC2531 USB Dongle to analyze whether the sender has not sent data or the data sent is incorrect.The factory default is this function. _x005f_x000D_ 2. Secondly, another important function is used to develop USB HID and cDc devices. cC2531 USB Dongle can be used as the receiving terminal to control the computer. _x005f_x000D_ 3. Used as a cc2531 development board. _x005f_x000D_ Features: _x005f_x000D_ 1. Flash CC2531ZNP-Prod firmware for zigbee2mqtt applications  _x005f_x000D_ 2. Leads out 8 IO connectors  _x005f_x000D_ 3. Debugging interface  _x005f_x000D_ 4. Size: 57x17x7mm/2.24x0.67x0.28inch _x005f_x000D_ 5. Two buttons and two LEDs for user interaction _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 USB Dongle 1. Flash CC2531ZNP-Prod firmware for zigbee2mqtt applications 2. Leads out 8 IO connectors 3. Debugging interface 4. Size: 57x17x7mm/2.24x0.67x0.28inch 5. Two buttons and two LEDs for user interaction