These adjustable rechargeable dog collars have fiber optics that light up and are waterproof, come in 3 sizes, are available in six colors, and can be seen up to half a mile away, with a 1-year warranty.  LED will remain lit for 8 hours before needing to be recharged. Available Colors:  Red, Blue, Green, Yellow, Pink, Orange.  Sizes available: Small (10″-15″), medium (16″ to 19″), large (19″ to 26″).