Operating Voltage Range: 5–16 VDC, from a regulated power supply; Proximity Card Reader: Maximum read range*: 8 cm (3.15 in.) Modulation: ASK at 125 kHz Compatible cards: All 26-Bit EM cards; Tamper Output: Open collector, active low, max. sink current 16 mA; LED Control Input: Dry Contact, N.O.; Output Format: Wiegand 26-Bit or Clock & Data; Audio/Visual: Tri-colored LED indicator, built-in sounder; Operating Environment: Water resistant, suitable for outdoor use (IP65); Operating Humidity: 0% to 95% (non-condensing)en