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Operation is incredibly easy! Simply insert a 9V battery (not included) into the door handle alarm, switch it on, and hang it on a door handle or knob – that's it! Any movement of the door handle or door itself triggers a loud alarm, reliably signaling that someone is trying to gain access to your room, house, or apartment, etc. At the same time, the burglar is deterred, as they fear being discovered due to the noise they have made.
€65,43