Sometimes it's all in the name. More natural looking than the other G5 massagers Big Boss delivers intense vibrations as well as a fullness and realness that delivers a thrilling stimulation. G5 technology provides up to twice the power of the G4 model with greater vibration provided throughout the shaft not the handle. Also includes FlexiFUN technology which means extremely flexible 100% medical-grade silicone all the way to the core plus a key lock for worry-free travel and a battery level indicator so users will never be surprised by a delay in play!