The Shure SLXD4 is a professional-grade digital wireless receiver designed for reliable and high-quality audio transmission in various settings, from lecture halls to live performances.

Operating in the Ultra High Frequency (UHF) range of 562 - 606 MHz, it features a removable antenna and is powered by an external AC supply.

Technically, the SLXD4 delivers transparent 24-bit digital audio with an extended frequency response ranging from 20 Hz to 20 kHz, depending on the microphone capsule used. It boasts a wide dynamic range of 118 dB, ensuring high-fidelity sound reproduction with very low distortion (less than 0.02% total harmonic distortion).

Key features include:

• Digital predictive switching diversity: Enhances wireless reliability through stable RF performance and interference resistance.
• 44 MHz RF tuning bandwidth: Allows access to up to 32 channels per frequency band.
• Supports multiple systems: Up to 10 systems in a 6 MHz TV band or 12 in an 8 MHz band.

Power-wise, it runs on two AA batteries with a battery life of up to 8 hours. The system is housed in a rugged, metal galvanized steel chassis measuring 42 x 197 x 152 mm and weighing about 816 grams.

In summary, the Shure SLXD4 is a robust digital wireless receiver offering high audio quality, flexible frequency management, durable build, and ease of use for professional audio applications.