Features: 1.One Light and 3 Colors: Blue, red, and green light colors are optional. Quickly press the switch twice to switch the light color. When it is used again, it automatically remembers the mode and color set last time. 2.USB Charging: When charging, the red light breathes and flickers, and it turns into a green light. Charging is complete. Pass the IPX7 level waterproof test, suitable for various scenarios. 3.Translucent Shell: Good light transmission, comfortable lighting and not dazzling. There are two ways of wearing, which can be fixed on pet collars and chest back with buckles or hooks. 4.Life is Easier: When you walk with your pet at night, you can use the safety collar light to help them find the location of your pet. It will also help you and your pet walk more safely on rainy days. 5.Multiple Uses: Clip a lightweight and durable safety light to a pet's collar, or use it as a safety buckle, keychain, find tent cords and camping equipment, and can also be connected to people to improve visibility. Specification: Item Type: Pet Luminous Pendant Material: ABS Size: Approx. 4.2x3.8cm / 1.7x1.5in Battery Type: Lithium Battery (Included) Battery Capacity: 280mAh Light Color: Blue, Red, Green Charging Time: 1.5 Hours Charging Method: USB Charging 3 Light Modes: Breathing Mode, Pulse Mode, Constant Light Mode Suitable for Cycling, Climbing, Camping, Running PackageList: 1 x LED Dog Pendant 1 x USB Charging Cable 1 x English Manual Note： Manual measurement, please allow some errors.