The Yocan Rex brings you a quick, convenient, and portable way to do vapes on the go with your 14mm or 18mm glass piece by change the direction of male/female attachment, allowing you to take advantage of moisture-conditioned vapors while vaping with this device. Its featured QTC Coil is made for giant clouds and hits, perfect for cloud chasers which is hard to come by. With 1400mAh built-in battery, the device can output at 3 levels of voltage: 3.2/3.7/4.2V. Moreover, it is maybe the smallest device matching glass piece in the market, discreet yet effective.