Description_x000D__x000D_The warning whistlesget rid of wild animals through emitting a mixture of ultrasonic, frightening the animals. Device will begin to work whenever a slow moving object is detected and will return to hibernation mode in normal times. They can be installed on the car, motorcycle and any places you like._x000D__x000D_Features_x000D__x000D_-Color: Black._x000D_-Material: Plastic._x000D_-Size: About 5x3.5x2cm/1.97x1.38x0.79 inch._x000D_-Durable, fine workmanship, comfortable hand feeling._x000D_-The productsaresmall in size, suitable for most vehiclesinstallation._x000D_-Paste type, easy to install._x000D_-All-matchblack color, not against harmony._x000D_-Small body but super loud voice.Packing list2 x animals warning whistles