Sensitive Ultrasonic Design: The outdoor ultrasonic cat repeller adopts speaker design with Passive Infrared (PIR) sensor. When it detects that the moving animal is within the detection range, it will automatically emit the sound frequency, flash the LED glare and train the animal. The siren is very useful for driving animals. Note: It is recommended to use USB for the first time for full charging. Multifunctional: The ultrasonic solar cat repeller adopts the principle of infrared sensing and emits ultrasonic waves to drive away small animals and birds while detecting small animals. It can help you stay away from the harassment of stray cats, hamsters, rabbits, deer and other stray animals, and protect your garden and property. Safety and protection of the environment: The solar ultrasonic mouse repeller adopts dual-speaker design, using ultrasonic and LED lights to expel animals: environmental protection, no chemical substances, harmless to humans and animals. Remark: Solar Ultrasonic Cat Repeller will not have immediate effect, it may take 10-15 days to deter some aggressive animals. Portable Design, Wide Coverage: The Ultrasonic Solar Cat Repeller is easy to install and can be installed anywhere in a home, garden, yard or outdoor campsite. Solar repellents have very high noise emission levels, with sound coverage of up to 5,000 square feet. The infrared sensor has a left-right angle of 120 and an up-down angle of 55. Solar-proof and waterproof design and quality assurance: The ultrasonic outdoor cat repeller is equipped with a solar panel, which can be charged by solar power or USB power supply (including USB charging cable) under sunshine. The waterproof design allows it to continue operating in all weather conditions. Number of shipments:1 pcs