All our devices have the model number and serial number stickered on them.
For sockets, you can find it on the back of the devices.
Panel heaters have two stickers, on the right side of the heater, under the ON/OFF switch.
Floor heaters and oil heaters have two stickers on the underside, where the power cord comes out.
For Mill Sense, you can find it on the underside of the devices.
For Mill Silent Pro air purifiers, you can find it on the underside of the devices.
Outdoor heaters have it stickered on the back of the devices.