Never Lose That Important Call with This Wireless Glass Mount Antenna. Stick This On the Inside of Your Window and Get Stronger Reception Than You’ve Ever Had!This simple, compact and powerful glass mount antenna boosts the power for 900MHz, 1.5GHz and 1.9GHz mobile phones. There’s no installation required; just affix it to the inside of your windshield below the visor and you’ll have fewer dropped calls, better transmission, an extended range and improved reception. It’s one of the best ways I’ve found to hold a cell phone call together from beginning to end.