Ysmile via Amazon offers two Diaotec Ultrasonic Pest Repellers for $19.99. Coupon code "BC3XAR66" cuts it to $13.39. Plus, Prime members bag free shipping. That's tied with our mention from last week and the lowest price we could find today by $10. This device claims to repel mice, roaches, and other pests via 20kHz to 85kHz changing ultrasonic sounds. It features a night light and coverage up to 1,950 feet. Deal ends February 18.

Note: The 4-pack costs $22.10 with free shipping via the same coupon code.