Smooth Glide Technology: The new open blade cutting system allows for hair and shaving gels to easily pass through the foils and reach the blades, resulting in a smooth, silky shave 4 Blade Shaver: The hypoallergenic foils and trimmers move smoothly across the skin and leave no hair behind Optimal Angle Head: Shaving blades are positioned so that foils stay flush to the skin for a close, comfortable shave Flex Dual Sided Trimmer: Get speed and smoothness from this special blade that preps longer hairs to be cut by the foils Lift Logic Foils: The unique foil design allows for even shaving of all hair lengths by angling hairs towards the blades One full charge allows 30 minutes of cordless usage time; Recharge Time: 24 Hours