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Yale HSA Essentials Alarm Kit, Battery Powered, 5 Piece Kit, Self Monitored, No Contract, Wireless, PIR Movement Sensors, Door/Window Sensor External Siren, Keypad, No Monitoring Fee : Amazon.co.uk: DIY & Tools
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Yale B-HSA6010 Alarm Accessory Door/Window Contact, White, 15.2 x 8.8 x 3 cm : Amazon.co.uk: DIY & Tools
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Yale EF-DC Easy Fit Alarm Door/Window Contact, White, Accessory for SR & EF Alarms, for main access points : Amazon.co.uk: DIY & Tools
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