The Boundless Terp Pen XL is an upgraded version of the original Terp pen that was released in 2019. Both devices are essentially draw-activated nectar collectors which can also be an eRig for smaller stemmed water pipes. The Terp Pen XL features a redesigned ceramic coil, a larger battery, and 3 temperature settings.
With both Terp Pens, there’s the option to either take a traditional dab or a cold load. A hot load results in a more potent hit, while a cold load (loading the concentrate and then inhaling) gives you more flavor and less vapor.