Linger via Amazon offers the Vensmile Ultrasonic Indoor Plug-in Pest Repeller with Night Light for $25.90. Coupon code "ZNT5Y69K" cuts it to $17.09. Plus, Prime members bag free shipping. That's tied with our January mention, $9 off list, and the best price we could find. It features a built-in light sensor. Deal ends April 17.