RTL-SDR V4 USB Software-Defined Radio Receiver — HF Support, 1PPM TCXO, Software-Controlled Bias Tee — Educational/STEM

Compact, USB-powered RTL-SDR V4 receiver designed for hands-on learning and experimentation. Provides HF support and a stable 1PPM TCXO frequency reference. Includes a software-controlled bias tee to power active antennas and a low-noise layout with ESD protection for robust reception. The unit is receive-only for compliant operation. Works with popular SDR applications — SDR#, SDR++, GQRX — on Windows, Linux and macOS. Portable and easy to integrate, it’s well suited for STEM education, radio-technology courses, and engineering projects.