The GP20 is a high performance proximity reader featuring long range and small dimensions. The unit will run from any voltage from 5 to 13.5vdc. The GP20 features high read range at voltages as low as 5 volts making it ideally suited to a wide variety of applications, particularly access control.The same basic unit can be configured to output most of the common interface formats, including Wiegand, Magstripe, Clock/ Data and RS-232 serial ASCII output, making it easy to upgrade existing installations.