The Piranha is an elegant yet ruggedly designed shaver utilising 2 floating replaceable heads. The Piranha will give around 2 to 3 weeks shaving from a full charge. The Piranha can be charged by wind-up, or the supplied USB cable or the supplied mains adapter. For times when electricity is not available or when you want total freedom, simply wind the handle for 60 seconds to get a smooth shave. The Piranha also has an integrated trimmer that is selectable at a flick of a switch. Charge indicators and optimum wind indicators are built neatly into the main body, so that under or over winding is avoided and maximum efficiency is achieved.