Technical Features for Norelco SH50 (2-Pack) <BR><BR> Blades raise then cut long and short hairs for a Fast shave <BR>Get a shave that’s fast and close. Our MultiPrecision blades raises and cuts all hairs and remaining stubble – all in a few strokes. <BR><BR> Super Lift & Cut <BR>The dual blade system built into our electric shaver lifts hairs to cut comfortably below skin level for a closer shaving experience. <BR><BR>Easy to replace heads <BR>1. Pull the shaving head holder off. <BR>2. Place the retaining ring holder on the retaining ring, turn it anti-clockwise and lift it off the shaving head. <BR>3. Replace the shavings heads with new ones. <BR>4. Place the retaining ring on the shaving head using the holder and turn it clockwise to reattach. <BR>5. Reattach the shaving head holder. <BR>6. To reset the shaver, press and hold the on/off button for more than 5 sec <BR><BR> important Notice: <BR>Dear buyer, hello. Thank you for choosing our shop to buy your favorite products. If you have any suggestions and comments during the use, please contact us as soon as possible. We will give you a satisfactory answer. Happy shopping.