New, unused. Opened for operational check. Please check the photos and consider purchasing. 【M】size: Approximately 50cm circumference ⭐︎Photo 18: Size can be adjusted Button press: 3-stage switching 1st press: Fast flashing, blue 2nd press: Slow flashing, blue 3rd press: Constant light, slowly changing rainbow colors, then changes to flashing rainbow colors, repeating slowly 4th press: Power off Mercari delivery Anonymous delivery Yu-packet mini 【Product Description】 ・This collar has three lighting modes: fast flashing, slow flashing, and constant lighting. Recommended for dog walks at night. ・ Long-lasting charging, USB rechargeable, can be used repeatedly. ・ Waterproof, safe even on rainy days. This glowing collar uses PVC material and is waterproof, so you can use it for walks on rainy days. ※Life waterproof level. Do not put it in the bath or pool. ★Before use, measure your dog's neck circumference and cut it with scissors to adjust the size. Suitable for small, medium, and large dogs. Pet, walk, collar, night, light, soft, lightweight, safety, waterproof, prevents pets from getting lost, prevents pet traffic accidents, small dogs, durable, size adjustable