The two cellular phone amplifier systems available to truckers from WeBoost are similar in many ways. This system, the WeBoost Drive Sleek is designed to clamp a single cell phone in the vehicle mount and provide massive performance to one phone at a time. If you are a solo driver, and you don't need more than one device amplified, this system is the way to go. Works with phones 5.1 inches to 7.5 inches tall.