Ebest - 3.7V 1800mAh 1000 Lumen CREE XM-L T6 LED in/out Headlamp + Charger + 1x18650 Battery Output bright can come to Max. 1000 Lumens Waterproof (but don't put it into water directly) Extensive lifetime of Cree LED (100,000 hours) 3 Modes: High / Low / Strobe Switch: Beside the battery holder cover