Description
The Knightsbridge SF8909BN is a 230V shaver socket with integrated USB-A and USB-C charging ports behind a black nickel screwless faceplate with a black insert. The unit combines a dual-voltage shaver outlet (115V and 230V) with 5V DC USB charging at 2.4A shared output, allowing shavers and electric toothbrushes to run simultaneously with phone or tablet charging.
Designed specifically for bathroom installation, the socket carries an IP41 rating that protects against solid objects larger than 1mm and vertically dripping water. The built-in gasket behind the screwless cover plate provides additional moisture resistance when the cover is correctly fitted to the metal sub-frame. The 230VAC 20VA transformer isolates the shaver outlet from the mains supply, meeting EN 61558 safety certification for use in wet environments.
The socket requires a 47mm minimum back box depth for safe installation. The screwless cover plate clips onto a separate metal sub-frame fixed to the back box, leaving no visible screws or fixings on the wall once installed. The black nickel finish provides a dark metallic accent that pairs with contemporary bathroom schemes, particularly where black tapware, shower fittings or mirror frames are already in use. The 4.3mm projection from the wall gives a low profile that suits tight clearances around mirrors and splashbacks.
The USB-C port supports modern fast-charge protocols for newer devices, while the USB-A maintains compatibility with older cables. Both USB ports share the 2.4A output, so charging speed reduces when two devices draw power simultaneously. The shaver outlet operates independently of the USB ports and can run a shaver or toothbrush at the same time as USB charging without affecting performance.
Specification
| Height |
147.5 mm |
| Width |
87.5 mm |
| Projection |
4.3 mm |
| Recessed Depth |
45 mm |
| Min. Mounting Box Depth |
47mm |
| Construction |
Premium grade steel |
| Finish |
Black Nickel |
| Class |
I |
| IP Rating |
IP41 |
| Primary Voltage |
230V 50Hz |
| Earth Terminal |
Yes |
| Warranty |
2 |
Downloads
Product Specification Sheet
Product Manual
Frequently Asked
Is this safe for bathroom use?
Yes. The socket carries an IP41 rating and meets EN 61558 certification for bathroom installation. The shaver outlet uses an isolated transformer that separates the shaver circuit from the mains supply. The built-in gasket behind the screwless plate provides additional moisture resistance when correctly fitted.
What back box depth is required?
A 47mm minimum back box depth is needed. The recessed depth of the fitting itself is 45mm, and the 4.3mm projection from the wall once fitted gives the overall clearance requirement.
What's the USB charging output?
The USB-A and USB-C ports share a 5V DC 2.4A output. When two devices charge simultaneously, the 2.4A is split between them, reducing the charge rate for each device. The USB-C port supports modern fast-charge protocols where the device and cable are compatible.
Can I use a shaver and charge a phone at the same time?
Yes. The 230V shaver outlet operates independently of the USB charging circuit, so you can run a shaver or electric toothbrush from the shaver socket while simultaneously charging devices via USB without affecting either function.