The Kamry K-100 Starter Kit is ideal unit for beginners looking for an easy to use mechanical mod. The K-100 is a simple to operate, fully mechanical telescoping mod that is compatible with most 510 threaded tanks. Available in chrome and black, the K100 Kit includes (2) 3.7v Li-ion batteries (18350 & 18650), two 510 cartomizers, wall charger, a stainless steel drip tip, as well as a deluxe carrying case.The K-100's firing switch is mechanical and located at the base of the device. The collar on the switch assembly can be screwed down to lock the switch to prevent accidental discharge and overheating. This unit also features multiple vent holes for added airflow and protection. The Kamry K-100 (like all mechanical mods) is an unregulated device and is designed for advanced users. Mechanical mods should not be used by anyone without proper product knowledge.