The silver re-usable pen is great for everyday use. It is button activated and can be charged via a USB adapter and a micro usb cable. Only the USB adapter is provided.
Click the button 5 times to turn it on.
Click the button 5 times to turn off.
Screw on a 510 thread compatible cartridge and hold down the button while inhaling. A recommended pull is 2 to 5 seconds.