Easy to replace heads
1. Pull the shaving head holder off. 2. Place the retaining ring holder on the retaining ring, turn it anti-clockwise and lift it off the shaving head. 3. Replace the shavings heads with new ones. 4. Place the retaining ring on the shaving head using the holder and turn it clockwise to reattach. 5. Reattach the shaving head holder. 6. To reset the shaver, press and hold the on/off button for more than 5 seconds.