Ergonomically compact design conceals and protects vape cartridges, all while providing an unparalleled vape experience. Colors: Black, White, Red, Blue Battery Capacity: 650mAh Connector: Screw-in 510 Thread, Fits Either 0.5ml or 1.0ml Cartridge Working Voltage: 3.2-4.2V Charging Voltage/Current: 5V/500mA Charging Time: 1.5 hours Resistance Range: 0.5-2.2Ω Size: 34mm(L)*18.2mm(W)*79.6mm(H) Operation: Inhale Activated, Buttonless Technology