Features of Innokin i Taste Leo Pro Starter Kit: Built-in 1000 m Ah polymer Li-Ion rechargeable battery LEO Pro contains a built-in 1000 m Ah polymer Li-Ion rechargeable battery to supply the daily needs of even heavy smokers. Ergonomic manual button design LEO Pro’s ergonomic manual button design is a combination of European & American concepts, much more comfortable to click.ON/OFF battery switch LEO Pro is designed with an ON/OFF battery switch. Quickly clicking it three times will enable or disable the battery. Once enabled, holding down the button will active the LEOPro battery.LED battery capacity display LEO Pro battery utilizes advanced capacity display via green, yellow & red LED lights. Users will know the battery capacity via the color of the LED Button. The lights show fully charged (green) to needing charged (red) respectively. Pass through LEO Pro continues to use of the mini-USB Port. You can recharge the LEO Pro with a standard mini USB (Universal Serial Bus) plug...