HIKVISION AX Pro Wireless Alarm (2nd Gen) – Keyfob (DS-PKF1) Wireless Keyfob DS-PKF1-WB series keyfob supports instant operation of stay/away arming and disarming. It is a part of security control system. -Operation: stay/away arming and disarming -Keyfob lock and unlock function -Fully remote configurable through App -Multiple enrollment method and easy installation design -Easy replaceable battery with PCB protected -Frequency hopping against jamming for reliable transmission RF Transmission RF Frequency 433 MHz RF Modulation 2GFSK RF Range 500 m (open area) General Operation Temperature -10 °C to 55 °C (-4 °F to +122 °F) Operation Humidity 10% to 90% (No condensing) Shell Material Panel (plastic) gasket(rubber) Weight 16 g (5.64 oz) Colour White