USB rechargeable double-sided collarReminder: It can be used for about 1-3 hours after charging for 30 minutes. (It is recommended to charge after the battery is used up. Do not charge for too long.)Product name: Leopard print rechargeable luminous collarMaterial: Polyester webbing, fish-mesh transparent surface, light-guiding flat optical fiber (length can be freely cut)Color: red, blue, yellow, green, orange, colorful, white, pink.Flashing mode: long on, fast flashing, slow flashing (controlled by switch)Battery life: 30-40 hours, about 2 months of normal use; the battery can be replaced by yourself, and is available in convenience stores or supermarkets. Cleaning the detachable electronic part. This product is suitable for walking the dog in the dark environment or at night, outdoor and pet sports. It emits light through optical fiber and acts as a warning. It can be used for pets during the day or night when the light-emitting function is turned on and off.【specification】:Size S: Suitable for neck circumference of 34-41cm, width of 2.5cm, total length of 44cm, using 2 CR2032 batteriesSize M: Suitable for neck circumference 37-46cm, width 2.5cm, total length 50cm, use 2 CR2032 batteriesL size: Suitable for neck circumference 41-52cm, width 2.5cm, total length 56cm, using 2 CR2032 batteriesXL size: suitable for neck circumference 42-56cm, width 2.5cm, total length 60cm, use 2 CR2032 batteries[Reminder] Choose the size based on the actual neck circumference of your dog! Between different colors: yellow and orange have high brightness[Function introduction]: Each model has a hidden switch with 4 functions: fast flashing, slow flashing, static flashing, and off.It comes with a button battery (remember to remove the collar when taking a bath and pull out the battery box directly). The button battery is very convenient to buy in the supermarket!