The SMOK GX350 Box MOD has the maximum output power(350W) in the global with a so much compact size. The max output power can up to 350W when powered by 4 x 18650 batteries. And the Micro-USB port supports firmware upgrade but not for charge. Available in 4 colors.
Parameters
Size: 84.5mm x 59.3mm x 40.4mm
Output Power: 6-350W
Temp Range: 200F-600F/100-315C
Resistance range: 0.1ohm - 3ohm (vw mode)/0.06ohm-3ohm (tc mode)
Battery: 4x 18650 battery cells (not included)
It comes with
Smallest size with strongest power
350W Power and replaceable 4x 18650 cells
Upgradeable firmware