The unit is hand-held with internal batteries (uses 8-AA-cell batteries that fit inside the handle and provide long operating life with its high efficiency...the battery for this highly efficient light will outlast you!). A second battery pack is included to provide for quick change-over while fishing. Both battery packs will give you 6-8 hours of use. The Light Engine on the tip uses a high-powered CREE LED with internal secondary optics, which enhance the light output even further. The light output is greater than most 12 volt/external battery unit. The COMPLETE UNIT is FULLY WATERPROOF and FULLY SUBMERSIBLE and designed for use in salt or fresh water and will not rust. This unit is MADE IN AMERICA with AMERICAN materials. This is a New Flounder Gigging Light with original packaging and with all instruction. Completely portable and self-contained. Can be used in or out of water and will not overheat. The light is 48 inches long and light weight (just over 2 pounds). Designed to be easy to handle in one hand while holding your gig in the other hand. This unit is FULLY SUBMERSIBLE. Satisfaction guaranteed or you may return the light for a full refund.