Device used to attach a speaker to a wall.

Collection of speakers in a home audio system.

Devices that allow you to speak on the phone hands-free by using a speaker and a microphone.

A type of photometer that can measure intensity as a function of the light source wavelength.

Hard hats worn on the top of the heat when doing dangerous physical activity or in dangerous places e.g. construction sites.

Here can be a short description of this collection.

Here can be a short description of this collection.

Component in a printer or photocopier that can staple documents together.

Piece of thin wire with two short right-angled end pieces which are driven by a stapler through sheets of paper to fasten them together.