TOMSHOO Super Bright LED Headlamp High Power Flashlight Water Resistance USB Cable Rechargeable Headlight Lamp for Biking Camping Climbing Other Outdoor Activities BRIGHT LIGHTING: One high-power LED with brightness reaching up to 120 lumens. Lighting distance from 40 to 60m. Discharge time ranges from 8 to 200 hours (8 hours based on the center light, 200 hours based on the side light). EASY TO OPERATE: Only one button! Press the button to get the exact light you need for any proper use. The head strap is adjustable, durable and corrosion resistant, easy to put on. And, battery rechargeable, so you don't take any batteries. 7 LIGHT MODES TO ADJUST: Bright white center light, low white center light, bright white side light, low white side light, red side light, white side light strobe, red side light strobe. BATTERY LOCK: This mode is to avoid wrong pressing when outdoors. You should press the button for 5 seconds ,then the red side light will flash twice, which is the lock state. Then, whatever you press, the side light just flashes twice. If you want to unlock it, you just press for 5 seconds again, there is green side light flashing twice. WATER RESISTANT: The IPX 6 water resistance ensures a reliable performance even in worst weather like heavy fog and rain(not for diving).