A top quality, no installation required antenna that will increase your Sierra Wireless AirCard USB 301 3G and 4G signal strength while removing most EM radiation away from you and into the antenna. Simply plug the included cable into your Sierra Wireless AirCard USB 301 antenna port and enjoy the increased signal and improved data transfer rate. This signal improvement system is made for the Sierra Wireless AirCard USB 301 but should you change device in the future, you'll be able to simply replace the included adapter without having to purchase the complete system again. Total cable length of at least fifteen feet included. Patent pending. One year limited warranty included.