Solar Ultrasonic Repeller

I've bought Larry Mo and Curley the allotment foxes a couple of little gifts off ebay that will be installed at either end of my plots. 

Solar Ultrasonic Garden Deterrent Repeller Animal Bird Cat Scarer Pest Fox Dog

High quality and 100% Brand New

Handy ground spike makes it easy to place product anywhere in your garden.

Device only activates when motion sensor is triggered, making the most of its power supply.

Solar power means this product requires no cords or cables - simply put in place, and wait for it to charge.

Solar Animal Repeller, Waterproof Solar PIR Sensor Pest Repeller, Ultrasonic Electronic Pest Animal Repeller,

Bird Repellent, Rodent Repellent, Dog Repellent, Mice Repellent. You'll start to see a difference within a week, and within a few weeks even your most stubborn visitors will be deterred.

Specifications

Range: 5-8 Meters
Material: ABS plastic
Waterproof grade: IPX4
Sensor angel: 110 degree
Size: 39*14cm/15.3*5.5IN
Ultrasonic Frequency: 25 - 65Khz
Coverage Area: 30 feet @ 110° = 2,425 square feet
Battery voltage: 6.6V
Power: 5W
Rated voltage 4.4-6.6V
Power supply: Solar panel and 3 x AA batteries

I bought a pack of two on offer for £8.75 including vat from ebay and they arrived today, and I have had them out in the sunlight on charge all afternoon. The average price range is between £8.55 to £9.99 with free delivery for one.

I will have to see if they actually prevent Larry Mo and Curley, and the cats at all.