The Illumifun LED Dog Collar is a medium-sized collar that lights up with LED lighting for enhanced visibility during nighttime walks. It is rechargeable via USB and comes in a stylish green color. This collar is designed with the satisfaction of both you and your dog in mind, ensuring a 100% guarantee of quality and professional customer service for any issues that may arise. With a 30-day money-back guarantee, you can trust that you are making a safe and secure purchase for your furry companion.