The UV-50X2 has been upgraded with Audio I/O support through the RJ45 Microphone Port. Included is also a K1 Audio adaptor. The K1 accessory jack is the most common radio accessory jack in the market. This means the UV-50X2 has the widest support of aftermarket audio accessories allowing you to find the best accessories for however you use your radio. The UV-50X2 includes all of the necessary mounting hardware to easily wire into any vehicle. You can use the UV-50X2 as a base station at home or in the office with the optional RPS-30M power supply (not included). Recommended Accessories: Pair UV-50X2 with the Nagoya UT-72 Magnetic Mount Antenna for easy installation. The PC04 FTDI Cable is recommended for easy computer programming. The UV-50X2 operates as multiple radios in one, with either 144 MHz or 430 MHz as the “Main” TX/RX band, while simultaneously watching up to 3 other frequencies or channels; and, if you like, you can configure your UV-50X2 for simultaneous VHF-VHF or UHF-UHF operation, too! Kit Includes: BTECH UV-50X2, RJ45 to K1 Audio Adaptor, Speaker Mic, DC Cable, Radio & Mic Brackets, Mounting Hardware, and User Guide.