Vivaglory LED Dog Safety Collar, USB Rechargeable Nylon Dog Collar Avaliable in 8 Colors & 4 Sizes USB RECHARGEABLE DESIGN: No need batteries, the collar can be recharged by the USB cable with the daily use devices, which is very eco-friendly SAFETY: The LED light design can make your dog more visible and safer in the night PERFECT FIT: Adjustable dog collar and quick-release buckle ensure the perfect fit; The D-ring on the Collar is for a leash 4 FLASHING MODES: Change the light between steady mode, four flashing modes with rapid flashing, slow flashing, solid flashing and off can be achieved LIFETIME GUARANTEE: 100% MONEY BACK GUARANTEE: Vivaglory is dedicated to address any product and service issues and is committed to delivering an excellent experience for all buyers. Any questions, please kindly contact us, we will give you a satisfied answer