Specification: Waterproof Rating: IP66 Lifetime: 6-240 hours Material: Reinforced high-strength aluminum Power supply: 18650 battery Charging method: USB direct charge (Typec) Size (MM): length * 87 diameter 24 * height 32 1. Super Bright: Equipped with 4200mAh battery, high power, maximum brightness 1200 lumens, and long-distance irradiation can reach 150m, which can meet your daily needs for going out at night, such as camping, hiking , running, cycling, hunting and fishing. 2. Adjustable and Comfortable Design: The headlamp can be adjusted up and down 180 degrees, and the headband can be manually adjusted to fit your head size. It is strong, soft and comfortable without falling off. 3. Rechargeable: It's built-in rechargeable battery with USB C cable, no need to buy batteries repeatedly. 3-4 hours for a single charge and works for 6-10 hours after fully charged. 4. 7 light modes: Long press the power button to adjust the light brightness; Double click the power button to switch light modes, such as: Strobe,SOS and Beacon. 5. Waterproof and drop-resistant: Our headlamp is IP66 waterproof grade, and the metal shell has strong anti-drop ability and can be used in rainy weather or harsh natural environment. Package includesA/C package: 1 * Headlamp ( No battery ) 1 * USB cable (type-C) B/D package: 1 * headlamp front 1 * USB cable (type-C) 1 * 18650 rechargeable battery Product parameters: Model: H02A-GCU2 / H05A-GUG2 Material: Aluminum Battery : 1*18650 rechargeable battery Battery life: 6-240 hours Charging method: USB(Type C) Size: 87x24x32mm Switch description: 1) Press the button in "OFF" state: "Light On", "Light Off" when you press the button again. 2) Long press the button in "OFF" state: "Moonlight Mode" , Light Off when you press the button again. 3) Double press the button at any state: 100% light mode, Flash mode, SOS mode, beacon mode 4) Long press the button in ON state: 5-level dimming (memory).