BYS2012 1600 Lumen Zoomable CREE XM-L T6 LED 18650 Diving Flashlight Torch Aluminum Type of LED : CREE XM-L T6 LED. Adjustable Focus : Can adjust its focus for different usage. Power by : 1x 18650 Battery (Battery Not Include). Size : 118mm x 25mm(Head Dia)/25mm(body Dia).