Aviditi BC105-L LED Lighted Dog Collar, Black with Red LED Lights, Large Helps you and others see your dog while out on walks at night or in the dark 4 Different light settings: Slow-flashing, quick-flashing, non-flashing, and off (for daytime use); Simple push-button operation Made from durable black nylon webbing with super-bright LED lights Color: Black with red LED lights Size: Large; Measures: 1-Inch by 17.7-20.5-Inch (2.5cm by 45-52cm)