Night lighting design: The dog collar light can be illuminated at night with a visible range of more than 1/2 mile, which is very suitable for walking or traveling at night to ensure the safety of you and your pet.Upgraded rotatable lampshade: The lampshade is designed to be rotatable, and the switch is designed as a compact contact press type. (Reminder: It is recommended to rotate the switch to the top clip to avoid accidental touches by pets and cause the lights to go out.)3 light modes + 6 extra batteries: This luminous dog light has 3 settings: keep the light on for 30 hours, flash for 60 hours, and flash for 100 hours. The dog collar flash comes with six collar lights-blue, pink, yellow, green, red, orange, and 6 portable spare batteries.Multiple uses: The dog light collar provides bright enough ambient lighting for reading, finding keys or keyholes, locating tent lines and camping equipment. When running or cycling at night, it can be hung on the body or on a bicycle to remind other pedestrians or vehicles.Durable, waterproof and safe: The snap-on dog collar light is made of a sturdy stainless steel clip, which is not easy to fall off. The sturdy ABS material and waterproof IP44 design can be used on rainy and muddy roads, but cannot be used for diving.LED dog collar light-3 blinking modes for walking at night (with 6 extra batteries)3 optional lighting modes:Constant light mode: about 30 hoursFast flash mode: about 60 hoursLow flash mode: about 100 hoursNote: When the battery is about to run out, the 3 beads on the dog collar light will go out one by one. This is not a product malfunction. You only need to replace the battery to get back to normal.