The new StormPro2 storm-tracking system utilizes groundbreaking new technology and represents a quantum leap forward in storm-tracking capabilities. This next-generation design uses advanced new charging circuitry to eliminate the need for the constant purchasing and disposing of environmentally unfriendly batteries. The new Intelicharge technology allows the use and charging of the StormPro2 anywhere in the world. Plus, storm distances are now automatically displayed in both miles and kilometers, making this new system the most versatile portable storm-tracking device ever made.