The frequency range of this antenna is A: 824~960 MHz and B: 1710~1990 MHz, covering a wide frequency range to provide you with the best performance. A: <=1.7 and B: <=2.0 VSWR ensures minimum signal loss and maximum efficiency. The 50 ohm input impedance ensures compatibility with most GSM wireless devices. With a maximum power handling capability of 50 watts, you can rest assured that the antenna will handle high power applications without issue. The antenna has a gain of A: 2.15 dBi and B: 2.15 dBi, which can effectively enhance the signal strength, thereby improving call quality, speeding up data transmission and reducing dropped calls. The vertical polarization type further enhances the performance of the antenna, ensuring a reliable connection even in challenging environments. The antenna has a compact and lightweight design, weighing only 10 grams, and is easy to install, allowing it to be conveniently mounted on any window. Its understated appearance blends seamlessly with any interior, making it ideal for both residential and commercial spaces. In conclusion, WINDOW Antennas for GSM radio frequency applications are a powerful and reliable solution to optimize your wireless connection. Featuring a wide frequency range, high gain, and superior performance, the antenna ensures a stable, strong signal, allowing you to enjoy uninterrupted communications and seamless Internet browsing. Upgrade your wireless experience today with our WINDOW antenna.