SportDOG Brand Locator Beacon - Bright, Waterproof Dog Collar Light with Carabiner - Flashing or Solid Safety Light can be used for Night Walking, Jogging, Camping, Hunting, or Hiking Long range dog collar light with high visibility can be set to ON or BLINKING to make your dog visible in low light senarios for silent tracking Easily slips on to 3/4" or 1" collar strap or can be attached to the collar's D-Ring, a backpack strap, belt loop and many other places with the included carabiner All-weather Locator Beacon features waterproof and submersible design ensuring reliabe use during rain or when your dog goes swimming Replaceable CR2032 batteries provide up to 250 hours of on time; Setting light to flashing provides longest battery life By designing our products in the field, with heat, cold, rain, snow, dust, mud, and wind in mind, SportDOG has become the most recognized brand in the electronic tracking and training categories, making the promise to always create "Gear The Way You'd Design It"