A tried and true 510 battery with quartz heating technology from Airistech, the Quaser fits any 510 cartridge thread. Available in multiple colors. Once opened, use the provided mini-USB cable* to bring the battery to a full charge - typically less than an hour (the red light around the button will turn off when fully charged). Turn the device on by clicking 5 times quickly.Hold the button for a custom-timed dab or click 2 times quickly to preheat.To change the voltage click the button 3 times - green = low, blue = mid, red = high.Turn off the device by clicking 5 times quickly.It is recommended to turn off the device between each use. *Quasers available in this listing are an old version - new version is charged via USB-C