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 characteristics of the key switch, mechanical vs rubber dome. A mechanical key switch is usually more expensive, gives a stronger feedback and can be more precise.

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.

What the product is used for.

A scanner used to identify a person's fingerprint for security purposes. After a sample is taken, access to a computer or other system is granted if the fingerprint matches the stored sample. A PIN may also be used with the fingerprint sample.

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

The style of the keyboard e.g. straight, curved.

The colour e.g. red, blue, green, black, white.

Type of surface coloration e.g. monotone, image.

The material from which a thing is or can be made e.g. wood, plastic.

Indicates whether this product supports is "plug and play". Plug and play is hardware or software that, after being installed ("plugged in"), can immediately be used ("played with"), as opposed to hardware or software which requires configuration.

What the power source is.