Vivaglory LED Dog Night Safety Leash, USB Rechargeable Dog Leash for Walking, Jogging or Running USB RECHARGEABLE DESIGN: No need batteries, the leash can be recharged by the USB cable with daily use devices, which is very eco-friendly. SAFETY: The LED light design can make your dog more visible and safer in the night, which can prevent your dog from potential danger. FREE CONTROL: With enough length, you can adjust the length based on your need 4 FLASHING MODES: Change the light between steady mode with just 1 click, 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