Set-3PC Megi&reg; Pet Dog Safety Led Clip on Light Cat Safety Blinker Flashing Collar Keychain Green White Red Secure stainless steel carabiner -Water resistant Push button on/off switch,Flash or Glow mod which has bright LED area light Designed to keep you and your pet safe - Visible for more than 1/2 mile Dimensions: approx. 1.26" x 0.75"(Diameter and thickness) Package incl 3pcs dog flashing lights: 1pc white, 1pc green and 1pc red