買過各種各樣的Ultrasonic Pest Repeller,都不能絕對保障。有人買過這個嗎?
https://www.amazon.com/Diaotec-Ultrasonic-Electronic-Repellent-Deterrent/dp/B07VVL4NTS/ref=cm_cr_arp_d_product_top?ie=UTF8&th=1
家裏如果養小狗,不能用這些 Ultrasonic Pest Repeller 吧?