GST Ultra-Bright CREE 3W Head Lamp 160 Lumen - Zoom Beam Function Outstanding value and functionality in high-output head lamp for camping, biking, night work 3-watt CREE LED produces 160 Lumen to 170 meters, excellent battery efficiency on 3 AAA (not incl) Battery pack at back of head band for balance and superior wearing comfort - weighs just 4.5 oz Rugged aluminum body with zoom bezel adjusts from wide angle to focused beam; 90-degree tilt Two-way adjustable comfort-fit elastic headband, hi/lo & strobe power settings