The Adventure Lights Dual Function Guardian Dog Light is the toughest light of it's kind. Waterproof to 300 feet(100m), impact resistant, and able to withstand extreme temperatures. Each light comes with a battery pack (2 x 2032 lithium), locking belt clip and velcro collar attachment. Change functions from steady-on to strobing by simply flipping over the battery. When being seen is a priority, this light will strobe for up to 240 hours or 100 hours of steady-on. Weighing less than an ounce(0.8) this product was designed for and still in use by the Military.
The Guardian base and lens are extremely high impact resistant and the ultra bright LED is rated for over 100,000 hours. The Guardian is waterproof to a depth of 300 feet (90 meters) and will work flawlessly in conditions from -40 to 122 0 F (-40 -50 0 C). A variety of handy options are available that can be used to attach The Guardian to almost anything.