From the makers of the genuine Vamo, the KSD BOU by Kangside is a remarkable device that is tiny in size and huge in power. It's even smaller than the iStick yet It produces 30 watts of output powered by a 2200 mAh supply. It employs 510 threaded devices or eGo threaded devices with the included adapter. The battery is recharged with the included charger package and may also be charged from any USB port in home, office or car. It has full passthrough capability so it may be used as normal while the battery is recharging. Variable Voltage or Variable Wattage modes 2.0 Watts to 30.0 Watts 3.0 Volts to 8.0 Volts Acceptable range of resistance is 0.5 ohm to 5.0 ohm Use five clicks of the main button to turn it on and off. Use three clicks of the button to switch between voltage and wattage mode. Press the up or down power buttons once for each 0.1 incremental change. Press and hold a power button to activate rapid automatic cycling up or down. Press the opposite button to stop the cycle at the desired setting. The display shows output voltage and wattage as well as resistance, battery capacity and a timer. It has functions to protect the device itself and your atomizer coils. The upper and lower limits are automatically controlled to best suit the resistance of your coil The BOU comes with Kangside anti-counterfeit protection so you are assured you receive a genuine product This kit includes the KSD 30 Watt BOU in your choice of color with USB cable and wall charger, eGo thread adapter and instruction manual. All devices are fully inspected and tested prior to final delivery to ensure a trouble-free buying experience directly from an authorized factory distributor located right here in the Southeastern USA.