VOOPOO DRAG with Gene chip, with resonable price , more and more popular    Size: 90*54*24mm  Weight: 178g   DRAG with Gene chip   Specifications  Working Voltage: 6.4-8.5v  Working Current: 1-40A  Output Voltage Range:0-40A  Resistance under Wattage Mode:0.05-3.0Ω  Resistance under TC Mode:0.05-1.5Ω  Output Power:5-157w  Charging Voltage:5V  Charging Current:1800mA  Quiescent Current:≤10uA  Temperature Range:200℉-600℉,100℃-315℃  Working Efficiency:95%  Firmware Upgradable:Yes