It is an open source 2.4 GHz wireless development platform for experimentation. Based on the powerful -M3 LPC175x microcontroller and full-speed USB 2.0, the is an excellent way to develop a class 1 custom device of its kind. The entire board is only two and a half inches long, with a USB-A connector on end and an RP-SMA connector on the other. The difference between and other development platforms is that it can not only send and receive 2.4GHz signals, but also work in listening mode to monitor traffic in real time. This mode of has existed in low-cost WiFi modules for many years and has been widely used in research, development, and security audits, but so far, the standard has not had such a solution. Also, since it is an open source platform (software and hardware), schematics and are readily available for all your needs. 2.4GHz transmit and receive. Transmit power and receive sensitivity are comparable to Class 1 devices. Standard debug connector (10-pin 50K JTAG). In- Programming (ISP) Serial Connector Expansion connector designed for communication between Ubertooth or other uses. Six LED indicators Note: To open the schematic and board design files in package, you need to download the for KiCad tab, the open source electronic design automation package. Due to different batches, there may be differences in product appearance, color, and printed text, which not affect the use. Colour: Random Color, don't accept the specified color Material:PCB Package Contents: 1 x 2.4GHz open source test and research tool 1 x Dual Band WiFi Antenna Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.