Secure stainless steel spring clip.

Easily clips to the D-Ring on your dog’s collar.

Lighting mode: Flash – Slow flash – Long bright

First-time press —Flash; Press twice—Slow flash; Press three times — Long bright state.

Diameter: 3.5 cm

Thickness: 2.5 cm

Length: approx.5.5 cm

Power: built-in button battery(included)