Within two years your shaver heads cut 9 million hairs on your face. Replace the shaving heads and get back to 100% performance. Get a comfortable dry shave. The system with rounded profile heads glides smoothly across your skin while protecting it from nicks and cuts. Replacement reminder The latest Philips shavers have a built-in replacement reminder in the form of a shaving unit symbol. This symbol will light up and indicate when to replace your shaving heads. Reset your shaver to new After replacing the shaving heads, you can reset the replacement trigger by pressing the on/off button for more than 7 seconds. Otherwise, the replacement trigger will turn off automatically after 9 successive shaves. What's in the box 1 x Replacement Shaver Head Blades for Philips SH50