It takes my husband minutes to install both and have not had any issues traveling on interstates. A+ product As others state, fitment is an issue. Those things were tossed around with my heavy textbooks in my bag, dropped on the ground, and stepped on. I am very impressed by the quality, the sturdiness, ease of mounting with all the hardware needed. Good starter kit. I will buy and wear theses until the day I die. Im writing this review after 11 months ( Because now I am going to purchase new one and I come to know importance of reviews. These 10?s fit perfect for me. They issued another TOZO Bluetooth.