This part is the entire replacement keyboard for the SAM4s ER-5215M cash register. Although it would be very rare to require a replacement keyboard from normal wear and tear they are available.
The few times we have had to replace a keyboard on a SAM4s ER-5215M is because of damage caused by spillage or abuse. These are commercial grade machines and stand up to a lot of use. If you suspect the damage is due to a spill make certain the main logic board was not also damaged. If both the keyboard and logic board are damaged it is time for a new register.
Please note this keyboard comes with the five button default factory configuration. If you require the optional additional buttons you may be able to salvage from your old keyboard or if not you will need to order additional buttons.
Replacing a keyboard is pretty simple just make sure you have unplugged your register before making the repair. You may want to invest in a SAM4s ER-5215M Keyboard Cover