At Sound Performance, technicians upgrade cars with name-brand mobile electronics and alarm systems. They retool automotive acoustics with stereos, subwoofers, and speakers from brands such as Kenwood and Pioneer, and integrate smartphone ports into stereos so that motorists can tap into their music library while they drive. To protect the high-tech gadgets from the heat or the jealous eyes of strangers, technicians also install scratch-resistant LLumar window tints, which are cut with precision using a special computer system. Sound Performance prepares drivers for winter with remote starters, which enable drivers to warm up the car at the touch of a button without leaving the comfort of their home or curbside tanning bed.