Requires no electricity - Ideal for everyday use. * FSS Technology allows you to choose the sparkling intensity of your beverages by turning a dial on the appliance. CO2 release is controlled so none will go to waste. The FSS technology is also significantly quieter than competitive brands. * Fast mounting Sparkler connection, no repetitive threading. * Bottles feature bayonet connection that is fast, easy and secure. * Compatible with 0.5L and 1.0L bottles.