When you fully insert the key into the meter it displays the dollar value remaining on your key for the provider of the meter that you are attempting to use. The meter will then automatically deduct $.25 from your key balance and put time on the meter. It may be necessary to insert the key more than once before the meter registers time.  

To register additional time on the meter, reinsert the CashKey. The CashKey does not need to be completely removed before reinsertion, so be careful to avoid unintended reinsertions.

Caution:
The meter will not register more than the posted time allowed, but it will continue to deduct $0.25 from your CashKey each time it is inserted. 

If the key is left inserted for more than five-seconds, the meter will flash in the out-of-order mode until the key is removed. This is to alert you in case you inadvertently leave the CashKey in the meter. (contd...)