High-Performance Compatibility: Specifically designed to enhance the precision of STRONEX and UniStrong GNSS models, this QT440A GPS Antenna operates effectively within the 430-450MHz frequency range, ensuring reliable and accurate geospatial measurements. Optimal Signal Gain: Boasting a 4dBi gain, this antenna amplifies the signal reception quality, which is crucial for conducting detailed and extensive geographical surveys and other critical measurements in diverse environmental conditions. Safe and Chemical-Free: Manufactured with a focus on safety, this GPS antenna contains no high-concern chemicals, making it a responsible choice for users prioritizing environmental and personal health. DIY-Friendly Installation: Tailored for electrical DIY supplies, this antenna allows for a straightforward setup process, enabling both professionals and amateurs to easily integrate it with compatible GNSS receivers without the need for specialized tools. Robust Design and Origin: Crafted with durability in mind and originating from Mainland China, this antenna is built to withstand the rigors of fieldwork, ensuring long-lasting performance in a variety of outdoor and industrial settings. Description/Features: High-quality GPS GNSS antenna, model QT440A, designed for precision and durability. Compatible with a range of brands, specifically tailored frequencies for optimal performance: * 410-430MHz for Trimble. * 430-450MHz suitable for STRONEX (except S10), UniStrong (except G10). * 450-470MHz ideal for Hi-Tech, China Airlines, Sanding, Tianyu, Ruide, Zhongnuo GNSS. * 410-470MHz for CHCNAV radio antenna, STRONEX S10, UniStrong G10. Features two main antenna interfaces: TNC-J and SMA-J. Ensure compatibility with your device's interface before purchase. This compact radio antenna is perfect for setti