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Details: 510 threading connector (floating brass 510 center pin) Four control buttons: Button 1-SMOKING, button 2-MENU, button 3-MINUS, button 4-PLUS 1.77 inch TFT LCD display screen showing output voltage, output wattage, resistance, battery voltage, current, locking mode, setting parameters, the value of the parameters of the system, product ID, microSD card, etc Variable wattage - can be adjustable from 1.0W to 100.0W (in 0.1W increments) Variable voltage - can be adjustable from 1.0V to 5.5V (in 0.1V increments) Input capacity range: 180-360W Resistance range: 0.1-4.0ohm Input voltage range: 6.0-8.4V Input current range: 30-60A Output current range: 0-20A Time range for one inhaling of smoke: 3-10s Short-circuit and reserve polarity protection Over-voltage and low-voltage protection Overheating protection Built-in micro-SD card With battery lock mode Powered by 2*18650 batteries (batteries sold separately)