FOSP Auto Navigation Upgrading Interface (German Tech & Components, Chinese Price). ----- FOSP Optoelectronics CO Ltd is based in Beijing and registered in HK since 2002. We are the leading company of manufacture, R&D, and sales of Car Multimedia Interfaces, GPS/Navigation, DVD/TV, CAN bus, Car Reverse Guideline, Car Monitor and Touch Screen for lots of cars: BMW, Benz, Audi, VW, Land Rover, Jaguar, Ford, Cadillac, Porsche... -----Our D&P: We have an internationally experienced technical team. We also own the rights to several technical patents. -----Our Honor: ISO9001 certificated, E-mark, CE, and ROHS certification. Our products were deserved "the most recommendable interface" by Germany car&hifi magazine at 2009. We were partnered with China Unicom: 2011 In Car Informatization Project. -----Contact: Suzy Yang (Skype: susyyang1224)

What a great place - great knowledge of equipment and installed my new stereo in record time. Took time to explain how to use it. I would, and will, recommend them to anyone in need of car stereos or alarm systems. It is difficult to find as it is behind a shopping center and not right on Busch - but well worth the effort. Will go back if I ever need anything else.

Great product. Great price. Outstanding service - fast and with a smile & great knowledge and helpfulness. Only down side is finding it's location. Call them directions. It was worth my small effort to get to them. I will definitely use them again.

Went and had my system rewired there after another stereo shop installed it badlyand screwed one of my amps up. they where very reasonable and made me sound better then before ....thanks guys !

12 Volts Unlimited was a great experience. Not only did they take care of my car, they went above and beyond. My 2001 lexus gs300 had been really messed up by previous owner. It was a total mess. The guys at 12 Volt not only gave me a great price, but they got my subwoofer to work at no extra charge and also put a new ashtray console in for a very little fee.. I would reccomend this shop to everyone. They also took care of me right away.

Just had my factory speakers replaced on my ford Excursion and was pleased with the result. Very professional and done right. Very knowledgeable and knew what he was doing. I will be back to have other components installed. Will reccommend this shop to my friends. Top Notch,, Thanks guys.

So I recently drove around tampa looking for someone to install my audio system. 12 Volts quoted me the best price. They gave me an appointment the next day and told me it was going to take 2 hours to install. Not only did they take me early but it took less time. They were very couteous and knowledgeable. They are the only ones I will trust with my car. They do alarms, audio, custom boxes, subs etc. So I walked in to get a head unit and head rest Tvs installed. I walked out with an appointment for my alarm installation. THEY OFFER A MILITARY DISCOUNT. I love this place and will not go any where else.