IT'S SIMPY GREAT The Uwell Caliburn G is the perfect device for beginners. It has a top filling cartridge with a silicone check valve to avoid e-liquid leakage and reduces the mess. The new replaceable Caliburn G Coil can provide you long lasting, even heating, full & original flavour. With a 690mAh built-in battery, its max output power can reach up to 18W. It supports direct vaping through air pressure sensor or vaping by pressing the fire button. It has a slender frame for a more comfortable grip. And the fire button is decorated with a golden ring to give it a bit of an elegant touch.