It uses solar power to recharge the batteries so its always working.

The Passive InfraRed sensor (PIR) detects motion and triggers the ultrasonic speaker emitting a tone that people cannot hear but chases away common outdoor pests like dogs, cats, deer, raccoons, mice, skunks, squirrels and more.

ColorDeep green or OEM

With Led indicator, Long-range passive infrared (PIR) sensor activated.

Ultrasonic frequecny :18-13KHZ

Repel typeCat,dog,fox,deer,rat,squirrels

power4 x "AA" Ni-CD rechargeable batteries

Solar panelAmorphous

Coverage area30 feet @ 110° = 2,425 square feet

UsageGarden/lawn

item size37*14*9.5cm