This highly water-resistant collar is designed for ultimate durability and is available in a variety of sizes to fit both bigger breeds of dog, and smaller, toy dogs.360° visibilityIntegrated optical fibre and two high-powered LEDs provide full-length illuminationGlow or flashEasy push-button operationWater-resistantHigh-quality metal belt-buckle style closure for quick and easy adjustmentStrong metal D-ringRecharges in approximately 1.25 hours using micro USB cable (not included)Run time: 6.5 hoursSize small dimensions: 18.11\" x 1.50\" x 0.79\" / 460 mm X 38 mm X 20 mm