2 in 1It is not only an LED bicycle light but also an LED headlamp with an adjustable headband Powerful bicycle light3T6 LED high quality powerful light, 4000 maximum lumens, extended LED life (100000 hours) 4 Modes to Choose1 bulb-2 bulb-3 bulb-strobe; 8.4V lithium battery, full charge takes six hours, 1T6 takes about 5 hours, 3T6 takes about two hours and 40 minutes Comes with 5 accessories: EU plug adapter + lithium batteries + adjustable headband + rear mtb headlight + O-ring, allows you to use it worry-free while traveling Led bicycle light suitable for all kinds of outdoor activities such as camping, cycling and other sportsModel Led CREE XM-L T6 Powerful focus for bicycle, with 8.4v battery, up to 4000 lumens With all necessary accessories to load and install a bike frameWaterproofing design Equipped with a rubber ring for installation, it is compatible with most bicycles, which is very convenient to disassemble and move.Package includes 1 x 4000LM 3 T6 CREE XM-L bicycle headlight 1 x Rubber ring for installation 1 x Charger 1 x 8.4V lithium battery 1 x Adjustable Head Range There are 4 different lighting modes Can be selected by pressing the power button: 1T6 2T6 3T6 Strobe Use two modes of use, you can fix the light on the bike or you can also use the adjustable light strip and use it as a headlight Provides super bright beam, max brightness 4000LM LED quantity (PCS): 3 Maximum Brightness (LM): 4000LM Voltage (V): 8.4V LED life: 100,000 hours Material: Aluminum alloyIt is perfect for your travel, hiking, cycling and other outdoor sports, etc