3 Mode LED Light up Dog/cat/pet Collars (XL 17-24 Inch, Green) Shipped From USA  Delivery 2-5 Business Days The LED dog collar Keep your dog safe and seen and Give your dog a cool glowing look. The perfect way to protect your dog at night Available in 3 sizes (Small 13  15 in) (Large 16  20 in) (Extra Large 17  24 in) and 4 different colors to choose from Red / Orange / Blue / Green the light up dog collar have three different light modes: 1) steady light 2) fast flashing light 3) slow flashing light Uses two Batteries CR2016 (Included) that can be Replaceable