The OKW V2 Modlite Multi-Mode head is compatible with Modlite 18650 and 18350 bodies, and other similar Dual Fuel style bodies on the market.Multi-Mode features 2 selectable modes High Mode/ High Mode + Admin Mode. This allows the user to easily program the light to their needs.These OKW V2 heads are best suited for use on a Handheld light.Runtime with 18650:High Mode will have a 75 minute runtime and is the default configuration the light will ship with.Admin Mode will have both the High and the Admin mode to be able to quickly switch between. High mode will have a 75 minute constant runtime. Admin mode will have a 10.6 hour runtime and is 15% of the high output.Runtime with 18350:High Mode will have a 35 minute runtime and is the default configuration the light will ship with.Admin Mode will have both the High and the Admin mode to be able to quickly switch between. High mode will have a 35 minute constant runtime. Admin mode will have a 3.6 hour runtime and is 15% of the high out...