Today only, A4C offers the refurbished AT&T / Harman Spark Smart Car Device for $49.95 with free shipping. That's $30 less than what you'd pay for it new elsewhere. It plugs into your on-board diagnostics port and expands smart control capabilities for most vehicles from 1996 on. But what does that mean? Well, here's some nifty things it acts as/does: WiFi hotspot for up to eight devices roadside assistance manager virtual mechanic alerts parking reservations read here for more information A 90-day A4C warranty applies.