Pestbye® Battery Operated Motion Activated Waterproof Cat Repellent Quick Fix Ultrasonic Cat Scarer with Ground Stake - Set of 3

The safe/humane way to keep cats and other unwanted pests (Dogs, Foxes, Squirrels, Rodents, some insects) out of your garden with fully adjustable sensitivity and frequency
Infrared PIR motion sensor detects the movement and body heat (reducing fake activation, extending battery life) upto 7m away activating the cat repeller to emit a high frequency sound, irritating to the cat and almost inaudible to humans
Easy set up - Includes zinc coated ground stake and tab for fitting directly to wall or fence. This cat repellent is fully weatherproof, you may leave outside in all weathers.
Battery powered, they are easy to install by pushing them into the ground using the stakes supplied, or they can be screwed to a wall or fence.
Requires 4 x AA Batteries (not included) battery life varies depending on activations but feedback from customers varies between 6 weeks to several months - (see questions section below)