LED and Reflective Safety Collar Leash combo. Features Super Bright LED lights to provide optimal visibility in low light conditions ensuring the safety of pets and their pet-parents. The adjustable, comfort fit nylon collar offers style and durability by day and with the press of a button, shines Super Bright at night with LED lighting visible up to 1000 ft in the dark. Includes three lighting modes, Constant On, Slow Flash, and Fast Flash to attract attention and make your pet visible in the yard, at the park, on the trail or on a leash. Patented technology ensures that the LED light tube remains brightly visible while protected from rough and tumble pet play. Powered with 2 standard CR2032 3V lithium batteries (included) which provide 100+ hrs of light before needing replacement and are simple to change without any tools. No need to worry about finding outlet space for another charger, forgetting to charge, losing cables, or limited power when camping and hiking. Unit also includes an Auto-Off function after 1 hour to save battery life if you forget to turn it off. Collar and Leashes available in multiple colors and sizes.Small Collar 3/4" wide - adjustable to 10" to 14"Medium Collar 3/4" wide - adjustable to 14" to 20"Large Collar 1" wide - adjustable to 14" to 20"X-Large Collar 1" wide - adjustable to 17" to 26"