Wireless Intruder alarm components. Wireless alarm parts utilise RF to communicate between the device and the receiver. The wireless receiver is usually the control panel or an expander. Most wireless alarm systms use 868MHz or 433MHz. There are 3 main typres of transmission, these are 1-way, 2-way and 2-way mesh. 1 way devices are usually lower security and are mostly used in lower security DIY type systems. 2 Way wireless is more secure as the transmission is acknowledged as recieved by the reciever.
Wireless Intruder Alarms
Risco

Risco 2-way wireless door/window contact RWX73M
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Risco Wisdom Wireless 4 Button Fob
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Risco Gardtec Hybrid GT Wireless Reciever (Eurosec CPX / 595)
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Risco Wisdom Wireless Door Contact
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Risco Wisdom Wireless External Sounder (Red Strobe)
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Risco Wisdom Wireless PET PIR Detector
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Risco Wisdom Wireless Shock Detector
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Risco Wisdom Wireless Smoke Detector
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Risco NOVA UNIVERSAL TRANSMITTER 433Mhz
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Risco Nova 4 Standalone Universal Reciever
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Risco

Risco Wireless door contact - 868MHz