Yale SAA5015 Wireless Shed and Garage Alarm

Amazon.co.uk Price: £16.00 (as of 18/06/2019 22:16 PST- Details)

Motion detection – Alarm will sound 10 seconds after motion is detected if PIN code is not entered.
Loud siren – 100dB siren is loud enough to alert you when motion is detected.
Range – 12m detection range suitable for protecting sheds, garages, outbuildings and caravans