The Ooze Hinge is a concealed 510 thread battery with a retractable flip design — press the side button to flick your cart out into firing position, press again to fold it completely inside. Slim, discreet, and pocketable. Digital screen, 5 voltage levels (2.0V–4.0V), Prep Mode for clog clearing, 210mAh battery with pass-through USB-C charging, 12-minute auto shut-off. Available in 5 colors. Retractable Flip Design: Cart flicks out to fire, folds back in to conceal — fully enclosed and protected when closed Digital Screen: Real-time voltage and battery level — no guessing, no LED color codes to interpret 5 Voltage Levels (Flex Temp): 2.0V / 2.5V / 3.0V / 3.5V / 4.0V — click 3x to cycle, displayed on screen Prep Mode: Click 2x for a low-voltage preheat that clears cartridge clogs instantly 210mAh USB-C Pass-Through: ~100 puffs per charge, use while charging, 12-min auto shut-off — cable NOT included