A $10 Fix That Could Help You Avoid Hitting a Deer — $9.99

Wind passing through these little horns creates a high-frequency sound, inaudible to humans but designed to alert deer well before they wander into your path. Deer-vehicle collisions spike at dawn, dusk, and night, especially on rural roads lined with trees, and this simple device gives animals an extra second of warning to react. There’s nothing to charge, program, or replace. Just clip them onto your bumper and they work automatically as you drive, powered purely by airflow. It’s a low-effort, low-cost way to add an extra layer of awareness to your daily commute, especially through wooded or rural areas.