Ultra-affordable and versatile! Remove this waterproof LED lamp from its adjustable headband and it clips onto your hat or shirt.  Two LED bulbs provide even lighting throughout your field of view, with no blank spots in the beam Waterproof construction ensures reliability in inclement weather  Adjustable headband holds the light securely in place  Runs on four coin-cell lithium batteries, included    Specification   Weight 1.8 ounces  Batteries 4 coin-cell lithium 2032   Dimensions 1.75'' x 1'' x 0.5''   Focus type Fixed   Material Lexan