Bob Ochsner, spokesman for KVH Industries and DirecTV, uses a remote to change channels on the portable televisions in his vehicle. TracVision A7 is a mobile satellite TV system developed by DirecTV and KVH Industries to bring 185-plus channels of live national and local programming directly to video screens already installed in millions of cars.

Playing backseat movies on road trips and even while riding around town has become popular, especially among parents with children.

The timeless question “Are we there yet?” has been replaced with silence, other than sounds from the movie.

But a mobile satellite system that features 185-plus TV channels might appeal more to people in carpools and sports fans than kids.

Developed by DirecTV and KVH Industries, the TracVision A7 mobile satellite TV system offers a “living room TV experience,” only in the back of vehicles, said Bob Ochsner, a KVH Industries spokesman.

By law, a monitor cannot be placed in the front seat where it might distract a driver.

A low-profile antenna sits on top of the vehicle and tracks the same satellite that DirecTV customers use at home.

Since the mobile satellite system launched last year, about 125,000 units have sold.

Interest increased dramatically once local channels were offered, Ochsner said. The companies have had the ability to present national channels since 2004, but the technology to offer local channels is revolutionary, he said.

It isn’t cheap to take your home theater on the road; the mobile satellite system retails for $2,995.

If you are a DirecTV customer, the in-car service will cost $4.99 a month. Those who do not have DirecTV at home pay $44.99 for the vehicle service. But most people prefer to sign up for service in the home and vehicle because it’s more affordable, starting at about $50, Ochsner said.

Mobile TV has been especially popular in states where drivers typically have long commutes: California, Texas and Florida. The mobile satellite doesn’t sell as well in urban areas.

“California is by far the biggest market because people are into their cars; they’re spending a lot of time in their cars and they’re into their media,” Ochsner said.

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