Feature: 1. STRONG COMPATIBILITY: Connect sound codec, CAT control, and switch to a computer via a single USB connector. Compatible with for Wins, for OS X, for Linux, for Android, and for iOS. No drivers needed. 2. FULL FUNCTIONALITY: Works with for FT8, for FT4, for JS8Call, for RTTY, for SSTV, for WinLink, for APRS, for VaraHF, for VaraFM, and for Soundmodem. Allows full CAT control in powerful transceivers and reliable adjustments for HT and basic mobile radios. 3. HIGH RELIABILITY: Prefabricated transceiver cables are available for popular for Elecraft, for Xiegu, and other popular brands, giving you a professional and reliable 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) with optional 3.3V voltage output support for LAB599 TX500 and reserve expansion port. Specification: Item Type: Integrated Digital Modes Interface Material: ABS Size: Approx. 53x23x14 mm / 2.09x0.91x0.55 in (excluding USB head protrusion) Power Supply: USB Powered Interface: 1 x Sound, 1 x Serial . Package List: 1 x Digital Mode Interface