Solar Dock Post Light, Fits on Fendock round leg post, 6 possible colors to choose from with the press of a button, 10 lumens, lights up automatically every night, universal fittings or 1-5/8?, 1-7/8?, 2-3/8? and 3-1/4? ID posts, universal flat surfaces, AAA Ni-Cd or Ni-Mh Battery included. Sold as a pair (package of 2). Compatible with Truss dock and Frame dock.