Backwoods Twist it’s a vape pen battery with variable voltage to control vapor production and produce clouds from small to really big. Backwoods Twist has an eGo and 510 thread connection that allows using almost any vape cartridge or atomizer [ not compatible with Sub-Ohm Tanks ] Original design with a luxurious velvet touch makes this pen a very attractive accessorize for vaping. Backwoods vape pen battery comes with an eGo/USB charger in a nice original package, in case it’s a gift for someone. It has everything to start using this pen immediately.