The Skruit in Black is a powerful and discreet 510-thread cartridge battery. Including TWO 510-thread adapter ports, any and all 510-thread cartridge is guaranteed to fit on/in this device. With three temperature settings, easily interchangable by pressing the button on the device, you can personalize your vaping experience to fit your needs/wants. This battery has an upgraded PCB board which makes it excellent for safe, low ohm vaping. So, screw it... get yourself a Skruit!