¹ The Kobold VK7 is the quietest cordless vacuum, emitting an all-time low 78 DB on carpet and 79 DB on hard floors. ² Kobold’s earlier model, the VB100, has a charging time of up to 3 hours, and top competitor brands have a charge time of up to 5 hours. ³ When using performance level 1. ⁴ Motor rotates up to 95,000 times per minute, or 1,500 times per second, a single point on the outer edge of the blower wheel moves at a speed of around 480 km per hour. ⁵ The VK7 is the quietest cordless vacuum cleaner in its category with a 78 dBA sound power level. It also remains relatively silent while the performance mode is activated. ⁶ The battery also contains self-cooling material that prolongs the runtime and prevents automatic switch-off due to high temperature. The optional spare battery does not only mean double runtime, but also a longer lifetime which is outstanding in the category as most battery-operated vacuum cleaners have a built-in battery which results in having to throw the complete vacuum cleaner away when the battery is worn down. ⁷ Based on average household usage. ⁸ When using medium level for vacuuming and mopping simultaneously. ⁹ The Kobold Universal, Universal Soft and Dry-Cleaning Cloths are made of high quality microfibres, more than 600km of microfibre yarn are processed in each cloth.