Feature Safe and Harmless: Cat repellent no chemical components threaten human health, the Passive Infrared sensor (PIR motion sensor) detects motion and triggers and then the ultrasonic speaker emits a tone that people cannot hear but chases away common outdoor pests. Energy Efficient and Rechargeable: Cat repellent have two charging options are available. Design with a solar panel and charging indicator, also equip the recharges the batteries (4 AA rechargeable batteries included, already installed in the device). Please charge the device before use. Perfect for Outdoors: Cat repellent waterproof to IPX4, rugged hard plastic(UV-resistant ABS shell) construction that withstands rain, snow, ice and wind, you can use them in any weather conditions still normal working. (Tips: Do not touch the charging interface when it works). Easy Installation: Cat repellent can be mounted in-ground with the provided spike, or hung on objects such as trees, fences and walls to ensure the best effect (with direct sunshine recommended). Packing List: Solar Animal Repeller Ultrasonic Outdoor *1 Insert Rod *1 Manual *1