The ThunderBolt Portable Lightning Detector industrial/utility package comes complete with a full range of accessories that allows for maximum flexibility in use and installation. The ThunderBolt unit included in this package is the highest professional-grade portable lightning detector offered by Spectrum, complete with the external connector jack for attachment of the Control Module for the Remote Warning System of optional accessories. FEATURES on the Standard Utility package include the following: Highest Grade Durable Plastic Fully Gasketed (water-resistant) External Jack for Wireless Speaker Accessories (accessories in development) Custom Desk Stand Custom Fitted, Hard-sided, Field Carrying Case Soft Carry Pouch Instruction Manual 120-volt AC Adapter* Custom Wall Mount * Included AC adapter is standard 120-volt for U.S. customers.