Feature: 1. Versatile Compatibility: The USB sound stereo adapter is designed to connect a computer to a range of radio equipment, supporting multiple communicating protocols including for TTL, for 232, and for CIV. This broad compatibility ensures that it can be used with various radio devices, making it a valuable tool for both amateur and professional radio operators. 2. Integrated Sound And Control Interface: This sound card jack USB adapter combines the functionality of a sound card and a serial port into a single compact unit. The integration allows for seamless sound transfer alongside control signals, optimizing the performance of radio operatings and simplifying the connection setup. 3. PTT Control: The external USB sound adapter supports USB serial PTT (Push to Talk) control with voice operated exchange functionality, enabling efficient operating of digital modes such as FT8, JT65, and PSK. This feature enhances communicating convenience, allowing operators to focusing on their tasks without manual control. 4. Compact And Portable Design: Measuring just 53mm x 24mm x 14mm (excluding the protruding USB connector), this external sound card adapter is easy to transport and suitable for field operating or mobile setups. Its small footprint ensures that it can fit into tight spaces without compromising on functionality. 5. Flexible Connection Options: Featuring dual 3.5mm 4 pin jacks, the USB microphone adapter provides flexible connectivity to different devices. Additionally, it supports a 3.3V voltage output, making it compatible with devices like the for LAB599, for TX500, while also leaving room for potential future expansions with its reserved interface, ensuring longevity and adaptability for various applications. Specification: Item Type: USB Sound Adapter Material: ABS Conversion: 3.5mm Sound to USB Size(excluding the protruding USB connector): Approx. 53 x 24 x 14mm / 2.09 x 0.94 x 0.55in. Package List: 1 x USB Sound Adapter