The Energizer Blaze USB Collar is made with wide fiber optics for maximum light transmission. This attractive collar features USB rechargeable battery, metal hardware, designer mesh, reflective stitching and a rubber paw on/off button. The innovative Energizer branded leash attachment system (quad reinforced) keeps the LED light on the back of your dog's neck, not hidden under their chin. With universal USB charging & Energizer approved electronics (a trusted leader in battery technology) the Energizer Blaze Collar will provide long distance visibility for your dog. Size Large fits up to 24".