Aviditi BC305-M LED Lighted Dog Collar, Blue with White LED Lights Helps you and others see your dog while out on walks at night or in the dark 3 Different light settings: Flashing, non-flashing, and off (for daytime use); Simple push-button operation Lightweight, durable, water- and weather-resistant Color: Blue with white LED lights Size: Medium; Measures: 0.79-Inch by 11.8-17.7-Inch (2.0cm by 30-45cm)