Ooze | Ruby Red | SLIM CLEAR | The Slim Clear vape pen is a 510 thread battery that is compatible with all pre-filled oil cartridges and wax attachments. It is a powerful 400 mAh battery with great battery life | TYPE-C CHARGER - The Slim Clear battery includes a type-C charging cable for rapid charging. You MUST use your Ooze type-C charger with this device | FLEX TEMP - This is a flex temp device with three voltage levels that are controlled by 3 clicks of the button. Low voltage (2.7V) is a red LED, medium (3.3V) is a blue LED, and high voltage (4.0V) is a green LED | PREP MODE - Prep Mode is activated by clicking the button twice. A gentle heat cycle will clear any clogs in the airway of the cartridge