Aviditi BC502-M LED Lighted Dog Collar, Black with Red 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, weather- and water-resistant Color: Black with red LED Lights Size: Large; Measures 1-Inch by 19.7-21.7-Inch (2.5cm by 50-55cm)