How it works: This product uses infrared detection to detect animals entering the area and uses ultrasonic waves and flashing LED lights to repel them. (Note: Humans can perceive some ultrasonic waves, so please keep this product away from areas where babies and children move frequently.) Pack of 1 This repellent has a detection angle of 120° and a maximum distance of 8-9 meters. This combination of two configurations can often protect small gardens. Two charging options (USB and solar) are prepared for outdoor use, and the sufficient waterproof level protects against rain. Thanks to its mounting options (wall-mounted or inserted into the ground), this repellent can work outdoors for long periods of time. Usage Tips Our instructions have different recommended frequencies for different animals. If the recommended settings do not work, you will need to try different bracelets to get the best results based on your specific usage. Also note: Do not cover the infrared sensor. Note: The