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.
Laser Distance Meter w/Digital Level Rail, Â±1/16 Accuracy, 2 to 265 ft. Range Laser Distance Meters w/Digital Level Rails. Accurately measures distances to, in, and around all types of surfaces, equipment, and structures by transmitting and receiving laser reflection.