2011 USB Rechargeable LED Dog Collar Black Stars-medium 20''(fits 14-18'' Neck)- White LED LED Illuminate DOG Leashes and Collars USB Charged Control Box - Never Need to Buy Batteries Control Box Speed Selection - Solid, Flash, and Strobe. Metal Clasp and Hook, Double Layered Material, Metal Studded Sizing Holes Reflective Weave for Extra Protection