Depending on the amount of use, the black button has a life expectancy of approximately two years. The first signs of wear may include difficulty unlocking or being able to pull off of the button without the use of a key. When either of these occurs, it is time to replace the button. What do you do once buttons begin to wear? If any buttons are experiencing signs of wear, they must immediately be removed from circulation. The circles on the bottom of the button ONLY indicate the quarter and year the button was produced. This is not an expiry date, but a reminder of the length of time it has been used. Buttons must be tested prior to use every time. What impacts how long a button will last? Button wear is directly related to the number of times it is locked and unlocked, but also the number of times the patient pulls on it.While they are simple to use, training is still essential. To ensure the locks are as effective as possible, please provide training and knowledge of proper operation for staff before they begin using any Pinel products.