Operating Voltage Range: 8 ~ 16 VDC, from a regulated power supply; Read Range: 9 cm (3.5 in.); Tamper Output: Open collector, active low, max. sink current 16 mA; Control Inputs: Dry Contact, N.O.; Reader Data Output Formats: RS-485 – OSDP; Operating Environment: Weather-resistant, UV-resistant, meets IP65, epoxy-potted, suitable for indoor and outdoor use; Operating Humidity Range: 0% to 95% (non-condensing)en