Operating Voltage Range: 5–16 VDC, from a regulated power supply (power usually supplied from host controller); LED Control Input: Dry Contact, N.O.; Tamper Output: Open collector, active low, maximum sink current is 32 mA; Read Range: 80 mm (3.0 in.); Compatible Cards: All 26-Bit EM cards; Operating Environment: Suitable for indoor use; Operating Humidity: 0 to 95% (non-condensing)en