Product name: pet glow collar Material: polyester webbing Color: Red/Blue/Yellow/Green/Orange/Black/Pink There are two versions of LED collars. 1. USB charging version Once the light gets weak, charging will help Improve battery life 2. Button battery version Replace the button battery when the power is off Flashing mode: long light/Fast flash/Slow flash (controlled by switch) Packing: One piece into one OPP bag, each piece has a size sticker and color sticker Battery: 2PCS CR2032 button battery drive Battery life: 30-40 hours, 2-3 months of normal use; the battery can be replaced by yourself, and it is available in convenience stores or supermarkets. Cleaning and detachable electronic parts This product is suitable for dark environments or walking the dog at night, outdoor and pet sports, it emits light through optical fiber, which plays a warning role, and it can be used by pets when the light-emitting function is turned on and off during the day or at night Please measure the circumference of your dog's neck and compare the size in the table below to purchase a suitable collar Product Specifications: XS width 2.0CM telescopic range: 28-40CM S code width 2.5cm short 35cm long 43cm telescopic range 8cm M code width 2.5cm short 40cm long 48cm telescopic range 8cm L code width 2.5cm short 45cm long 52cm telescopic range 8cm XL code width 2.5cm short 52cm long 60cm telescopic range 8cm Packing method: OPP bag packing