Compatible with: 510 Tanks Variable Voltage: 2.8V / 3.2V / 3.6V Battery: Built-in 500mAh Size: 57.5mm x 41.9mm x 13.7mm Airflow: Adjustable Pre-Heat Function: Yes, 10sec Connection: Magnetic Charging: Type-C Material: Aluminum Thread: 510 Three-Bar LED Indicator Inhale/Draw Activated