Features: 1.High Visibility: Dog collar has premium flat fiber, which keeps your dog safe in the dark; it is highly visible to car drivers, walkers, runners, cyclists, motorists, etc. 2.Durable Material, Long Lasting: LED dog collar is made of polyester tape, with flat TPU optical fiber, durable. It can be charged via USB and can run continuously for about 10 hours after being fully charged. 3.3 Modes: LED dog collar has 3 modes of lights, click to select 3 different modes: fast flash, continuous flash and continuous flash. 4.Adjustable: The LED dog collar is fully adjustable to fit almost any size, plus the quick release buckle, you can easily choose any way you need. 5.Weather Resistance: Anti rust, lightweight, sturdy and durable components make the waterproof LED light dog collar work in all weather conditions. Specification: Item Type: LED Dog Collar_x000D_ Material: Nylon_x000D_ Luminous Surface Size: Approx. 21cm/8.3in_x000D_ Battery Parameters: Model: CR2032x2 Coin Cell Battery (Self Replaceable)_x000D_ Nominal Capacity: 250mAh_x000D_ Rated Voltage: 3.0V_x000D_ Operating Temperature: -20C ~+60C_x000D_ Usage: Pet Luminous LED Collar PackageList: 1 xLEDDogCollar 1 x USB Cable Note Please allow some error in manual measurement.