Terp Pen XLThe Boundless Terp Pen XL operates with no buttons, just inhale to activate the heating element while dipping into your herbal concentrate. The amount of vapor produced is entirely up to you, determined by how much contact you apply between the Terp Pen XLs coil and your concentrate. Enjoy short draws for up to 10 seconds before the automatic shutdown activates. An amazing feature in the new design is the touch sensitive temperature control. Simply