Life-grade waterproof Partially cleanable detachable electronics for dark environments or dog walking at night Exquisite workmanship, multiple modes of light, make your pet more cool LED flashing ring, shockproof, adjustable length Available colors: red, yellow, green, blue, pink Blinking mode: long light, slow flashing, fast flashing (controlled by switch Battery: 2PCS button battery [not included] XS: suitable for neck circumference 28-38cm, width 2.0cm, full length 41cm S: Suitable for neck circumference 34-41cm, width 2.5cm, full length 44cm M: Suitable for neck circumference 37-46cm, width 2.5cm, full length 50cm L: Suitable for neck circumference 41-52cm, width 2.5cm, full length 56cm XL: Suitable for neck circumference 42-56cm, width 2.5cm, full length 60cm Specifications: Resistant, resistant, adjustable Strongest quality nylon necklace with strong clasp Applies to the dark environment or stroll at night the dog The luminous surface pattern can be designed Through ultra-bright fiber light, play the role of warning Personality, fashional,be different from dog group Package Included: 1 * Collar