Model Number: XR-P024-005-1 Brand Name: Xuerui Key Specifications/Special Features: Feature:Flashing LED Dog Collar, Nylon Material.Material:nylon webbing, optical fiber, bright led light.Size: S:2.5*20-30cm; M:2.5*25-50cm; L:2.5*45-75cm.LightColors: red, blue, green, yellow, pink,etc.Flashing mode: steady glow, quick flash, slow flash, power off.Battery: 2*CR 2025 button cells includedIt is perfect for training and walking occasion.Easily to see your dog in the dark by the bright.