Patented Electric Lightstick, the FX has 7 pre-programmed functions, virtually unbreakable, waterproof to an amazing 11,000 ft. Uses one 12V A23 battery that lasts over 30 hours of constant use. Visible light LED`s up to one mile and beyond. 2.75 in.x 0.75 in., 0.075lbs. Available colors are amber, blue, green , red, and white.