Shake Light (shakelight) Waterproof & Floats, 1hr use between shakes - The Best White LED technology, Full Spectrum - highly visible Faraday Effect Shake light with N35 Neodymium Magnet Oring sealed lens & Rubber sealed push button switch for waterproof operation & it floats. Dimensions: 7.87"L, Top Diameter = 1.72" / Handle Diameter = 1.35" I use one for bed time reading, they are bright and last hours on one shake charge