The GRAV® Micro-Pen Battery is short, chic, and discreet. It comes in five matte colors that complement any cartridge, and its three temperature settings and included USB charger offer control and convenience. The Micro-Pen is the perfect accessory for vaping on the go. 3" tall 510 threaded Both button-controlled and pull-powered Three temperature settings Three temperature settings Comes with micro-USB charger Available in 5 stylish matte colors