What the product should be used for, and how it should be used (e.g. ambient temperature).

The technology that enables connectivity of the device, e.g. wired or wireless.

The ports (sockets) where the device connects with other devices.

The letters which are marked on the keys for convenience of the keyboard usage with specific language.

Keyboard size, e.g. standard, mini.

Small, palm-sized, seventeen key section of a computer keyboard, usually on the very far right. The numeric keypad features digits 0 to 9, addition (+), subtraction (-), multiplication (*) and division (/) symbols, a decimal point (.) and Num Lock and Enter keys. Laptop keyboards often do not have a numpad, but may provide numpad input by holding a modifier key (typically labelled "Fn") and operating keys on the standard keyboard.

Product has a built-in light source for its illuminating.

La couleur, p. ex. rouge, bleu, vert, noir, blanc.

How long the cable is.

What the power source is.