Degsined to give the user longer battery life for the SilverCloud Real- Time Tracker GPS800, lThis accessory package comes with a hard water-proof magnetic case and an extended lithium-ion battery pack with rapid battery charger, The extended battery will provide up to 4 weeks of GPS tracking on a full charge, The water-proof case also has a powerful magnet for exterior mounting on or underneath the vehicle for covert applications, Water proof case, Heavy duty magnet for mounting, Up to 4 weeks of GPS tracking, Includes:, Water proof case, Extended lithium-ion battery, Rapid charger, SKU: KJB710