[Official Shop] Bao Core BXT TPU Nylon Waterproof Safety Collar Pet Collar with 6 LEDs Jewel Flashing Light for Cats or Dogs (Size: M) High visibility flashing, Provide safety for your dogs and pets while it's out alone at night. The Item have four modes:1.Steady On 2.fast flash 3.normal flash 4.no flash CR2032 battery powered (Included), can be used up to 80hours, the battery also can be replaced when it get dark Easy to wear and remove, easy to use and clean, lightweight and comfortable for your pet 4 Size, details in following: S: width 1.8cm/0.71", length 30~40cm/11.81"-15.75", 10cm/3.94" flexible range. M: width 2.5cm/0.98", length 40~50cm/15.75"-19.69", 10cm/3.94" flexible range L: width 2.5cm/0.98", length 50~60cm/19.69"-23.62", 10cm/3.94" flexible range. XL: width 2.5cm/0.98", length 50~70cm/19.69"-27.56", 20cm/7.87" flexible range.