LCD Keypad with 13.56MHz Proximity Reader for LightSYS™ and ProSYS™ / ProSYS™ Plus. Grade 2 certificate. Main panel connection: 4-wire BUS. Connection to BUS. Power supply: 13.8VDC +/- 10%, consumption 62 mA typical / 130 mA max. Dimensions (height x height x depth): 153 x 84 x 28 mm.