The Ari Series, the latest lineup of wax cartridge batteries. Granting the user the choice between smaller/slimmer or having a larger battery. All Ari's in the lineup use a standard twist dial for changing voltage, and press-to-activate button. The housing is made of stainless steel for a long lasting, durable device. Yocan also continues to update charging for all new devices, using USB-C for fast low hassle use. This is the Ari Plus, with a 650mAh battery and with the thinnest profile.