Specifications: S: 35cm-43cm (13.8Inch-16.9Inch) M: 40cm-48cm (15.7Inch-18.9Inch) L: 45cm-52cm (17.7Inch-20.5Inch) XL:52cm-60cm (20.5Inch-23.6Inch) Type:Dogs Usage:Collars & Leads Material:Nylon Material:Polyester Product Category:Collars Item:2.5 Mesh Collar Can telescopic:Can Color:Blue, white, red, orange, yellow, green , pink , colorful Size ( L * W ):S, M, L Applicable:Dogs and cats Product Name: 2.5 -emitting collars screen Material:Polyester webbing , fish screen translucent surface , bright guiding light flat fiber ( new material ) Color:Red, blue, yellow , green, orange , colorful , white, pink. Flashing mode:Long light . Flash Slow flash ( via switch control ) Battery:2PCS CR2032 button battery -driven Battery life:60-80 hours, normal 2-3 months ; battery can be replaceable , convenience stores or supermarkets are available . By CE, ROHS, EN471 waterproof , cleaning removable electronic part of the product is suitable for dark environment or walk the dog at night , outdoor and pet movement through the bright fiber optic light, from a warning , while expression of individuality , the fashion design fashion , day or night, when you turn on and off a light emitting function are suitable for pet use