The Jemit Designs Curve is a single 18650 (battery not included) hybrid wood mod run on Evolv's DNA60 chip. The compact design measures in at L 44mm W 27.2mm H 80.3mm and will fit up to a 26mm atomizer. The 510 connector is spring loaded and can be adjusted so that your atomizer can be raised up and down. The buttons are made from stainless steel as are the top and bottom plates. The battery is accessed through the base with a finger tightened screw cap to keep it locked in. The serial number is displayed on the faceplate of the mod.