Ultrasonic Rodent Repellent, 2 Pack Plug-in Mouse Rat Pest Bat Squirrels Skunks Repellent for Car with Battery Powered Under Hood, Keep Mice Out of Cars Engines, Indoor, Garage, Storage Room

Three power supply modes: Three charging modes are provided for easy use. 1: Use 4 AA batteries, 2: Use a USB cable to connect to a 5-12V adapter for charging, 3: Use a DC cable to connect to the power supply under the hood of the car. An unusual noise may indicate low battery; charge or replace the battery promptly Intelligent vibration sensing: When a vibration signal triggers the circuit (the car starts), the mouse repellent stops working and the red indicator light is always on. The machine resumes working after 90 seconds when the working environment is stable (no more vibration) Safety and energy saving: The sound emitted by the rat repellent is between 18,000 - 36,000 Hz, which will not affect humans and pets. When the car is driving, the mouse repellent is on standby and the battery can be used continuously for at least three months