The 3.5mm Mobile Phone Signal Enhanced External Antenna is a portable and convenient solution for enhancing cell phone reception in various locations. Whether you are in hallways, buildings, tunnels, or remote areas, this antenna can help increase signal strength and improve signal quality. It is easy to install and can be used with both digital and analogue signals. With a gain of 6dBi, this antenna is designed to enhance the performance of your cell phone reception. It operates at a frequency range of 1880-1920/1990-2170MHZ and has a vertical polarization type. The antenna has a rated power of 50W and an input impedance of 50Ohms nominal. Its compact dimensions of about 13.66*5.63cm/5.38*2.22in make it portable and easy to carry. The antenna features a 3.5mm connector and can be easily installed through adsorption. It weighs about 22g, making it lightweight and convenient to use. The package includes 1 Mobile phone external antenna, providing you with everything you need to enhance your cell phone reception. Key Features: Easy to install Enhances digital/analogue signal Increases cell phone reception in various locations Portable and convenient 6dBi gain Frequency range: 1880-1920/1990-2170MHZ Vertical polarization type Compact dimensions