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Micro usb cahrger included.
Battery life and voltage indicator.
● Resistance Range: 1.0-1.8ohm
● Single Button Operation
● Micro-USB Port - Samsung passthrough charging
● On/Off: Press button 5 times
● Preheat: Press button 2 times
● Volts change: Press button 3 times, 2.8V-3.2V-3.6V-4.0V