1 Place the cotton balls in areas where mice are likely to enter your house, by doorways or heat vents, etc. 2  Another helpful deterrent is to grow peppermint plants near the entryways. 3  You can use the mint in cooking as well as it serving a deterrent purpose.
Nov 12, 2015. 20 kilometers (12 miles) for a 1 milliwatt beam. Laser light can travel 20 kilometers (12 miles) per-milliwatt that is contained within the laser.
Also referred to as LIDAR (light detection and ranging), laser speed guns use light in extremely fast pulses to detect an object's speed. It has a range of 1,000 feet to 4,000 feet, and it's very accurate. One of the advantages of laser speed guns is that they're nearly impossible to detect beforehand.