Yocan UNI Twist 650mAh Universal Cartomizer Battery Mod

Compact Design Charged through: USB Type-C Powered By: Built-In 650mAh battery Magnetic 510 connector ring is included Five Click On/Off feature Two Click 10 Second pre-heat feature Preheat functionality Activated by clicking the power button 2 times. Preheat function runs for 10 seconds Adjustable Voltage Voltage Range: 1.8V - 4.2V Adjusted by twisting the dial located on the bottom of the device Adjustable Cartridge Holder Compatible with atomizers that have a diameter of 6mm-12mm Rotate the adjustment dial to adjust the inner diameter of the UNI to fit the atomizer of your choice. Built-in hanging hole to be used with lanyards or key rings