1. STRONG COMPATIBILITY: Connect sound codec, CAT control, and switch to a computer via a single USB connector. Compatible with for , for , for iOS. No drivers needed. 2. FULL FUNCTIONALITY: Works with for FT8, for FT4, for JS8Call, for , for SSTV, for , for APRS, for VaraHF, for VaraFM, and for Soundmodem. Allows full CAT control in powerful transceivers and adjustments for HT and basic mobile radios. 3. HIGH RELIABILITY: Prefabricated transceiver cables are available for popular for , for , and other , giving you a professional and user experience. 4. INTEGRATED INTERFACE: Combines sound card and serial port into one. Supports TTL/232 levels, USB serial control, and flexible connection to different devices with dual 3.5mm 4 pin jacks. 5. VERSATILE SOUND AND SERIAL PORTS: Defines sound input and output, PPT control (USB serial control, non sound), and serial port input and output (default TTL, can be changed to 232) Item Type: Integrated Digital Modes Interface Power Supply: USB Powered Interface: 1 x Sound, 1 x Serial Colour:As Shown Material:Plastic Package Contents: 1 x Extension Module 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.