Excellent product at a great price. I wish it came with paper instructions but the online guide is pretty easy to use and tells you exactly what you need to wire it into your wiring harness for whatever make and model car you have.

Installed in a 2003 Cadillac Deville. Coupled with PAC OS2-GM32X Retains factory on star and using existing amp. The factory system is only 2 channels. Hence no fade option on factory radio. So you only have 2 channel wires on the OS2-GM32X device. All speakers worked perfectly. The door chime I guess came from factory radio as it comes from this device now.Paired with a PAC SWI-RC-1 retained steering wheel controls. Picture shows correct dip switch settings when used with OS2-GM32X. Note the longer dip switches are what makes it communicate with car. The 4 dip switches depends on your aftermarket radio. No wiring needed just plug the SWI-RC-1 into the OS2-GM32X and the 3.5 mm plug into aftermarket radio.The picture of the dip switches are only when used with the OS2-GM32X.Lastly - I did not have the Bose system.

This thing worked fine for about a month with my 2012 Wrangler. then it just stopped working. I doubled checked all connections, the dipswitch settings, still doesn't work. I tired to get customer support, but you get redirected to a 404 error page. fantastic.

The unit I received was the PAC SWI-RC1. To install this unit, you'll need to put in the make of your vehicle and which radio you are using on the PAC website. In some cases, the vehicle you are installing this into is not on the official supported list, however in this case, you can still go with a manual setup. Once you put in the needed information, you'll be given detailed instructions on which wires to attach (and which ones to not use), and instructions on how to program the head unit. The setup type and radio type are programmed into the unit using DIP switches on the side. The unit also has a USB connection for firmware updates. For manual setup, the unit allows you to program the specific buttons on your steering wheel to perform specific functions tailored to your head unit.For many aftermarket head units, you must use this interface adapter to connect your aftermarket head unit with your steering wheel controls... however - some aftermarket units do not need this adapter when your vehicle uses analog resistor network buttons on the steering wheel. I bought this originally to go with a JVC KW-M590BT. The JVC unit would require the use of this interface adapter to translate the signals from the buttons in my vehicle with the head unit. But due to fitment issues, I ended up going with the Atoto F7G2A7WE head unit. As this was my first aftermarket head unit installation, I went ahead and wired up and programmed the PAC unit as instructed. But come to find out, this Atoto head unit has a built-in SWC Key program function, meaning that in the case your vehicle uses analog steering wheel controls, you can directly connect the head unit's SWC-Key wire to the respective wire leading to your steering wheel. The PAC unit in my installation was totally unnecessary. Basically, I had to first program the PAC unit with my Jeep's steering wheel button signals, and then program the Atoto to map the signals from the PAC to the respective functions. I later installed a second Atoto F7G2A7WE unit into a 2007 Honda Pilot and skipped the use of the PAC unit, instead direct connecting the head unit's SWC-KEY wire to the respective wire for the analog steering wheel controls. I was able to program the head unit to directly interpret the signals without the need for the interface adapter... So before you buy this, look up the aftermarket head unit you are buying as well as the vehicle you are installing this in to see if (1) your head unit has the option to be programmed to recognize your vehicle's steering wheel controls and (2) if your vehicle sends steering wheel button commands to the radio via an analog resistive dropper circuit, or by a digital signal. If your vehicle uses a digital signal such as CAN-BUS and you cannot easily tap into an analog signal wire for the buttons in the steering column, then use of the PAC adapter would be necessary to convert the signals back to analog to interface with the head unit.TLDR - This is a decent product, however you might not actually need this if your vehicle uses an analog steering wheel interface signal and the head unit has built-in mapping/programming to map your buttons to the radio functions, such as with my Atoto head unit.

Quality product with clear instructions found on PAC website. Retained steering wheel controls on my 2017 Nissan frontier.

Does it work? Yes. Does it work well? Well enough.Installed in a 2001 Infiniti QX4 (identical to installation in 2002-2003 Nissan Pathfinder) with a JVC stereo while retaining the stock Bose amp and speakers (another device is required to do that, but nothing to do with this piece).However... installation is a serious hassle. A hassle to the point that I almost did not install it in the end. The SWI-RC is the catchall of steering wheel control interfaces. It works with the most cars and the most stereos. A great feature to boast in theory, but in actuality that made it even more difficult to install.The included instructions were horrible, but the ones on their website were better. So this thing came with a bag of resistors which were absolute garbage with brittle wires that broke easily. That was ok, I was able to replace them with ones from work (I work for a company that builds electrical harnesses). By the way, if you need to replace the resistors in this package, use 1/4 watt resistors spread out about 200 ohms apart, but don't exceed 2k ohms. 1/4 watt resistors per PAC, this is not documented anywhere. One of their technicians verified this for me when I called them.Unfortunately, since this harness is built for such a universal fit, it's basically just a bunch of wires and you have to splice the appropriate wires (outlined in the pages of documentation) for your car and stereo combination. I decided it wasn't worth it to me to slice up my car's wiring, so I built a harness that fit my needs using the connector out of the back of my old stereo (like I said, the company I work for blah blah blah). Without doing that, I would have never installed this.Once it was installed, programming was quite easy and it works fine (most of the time).For that reason, unless you have some experience installing car stereos, building wire harnesses, soldering, etc., try to find one specific for your vehicle. Use this one as a last resort.

PAC JAPANの商品ではありませんでした。商品はPAC JAPANとあるのですが。性能は問題ないですが、日本語取説がPAC USAの製品であるためありません。PAC JAPANの保証も受けれません。その違いがあるので、注意が必要です。

Funciona super bien y con la ayuda visual que te proporcionan en la página para su instalación no se dificulta la misma

I used it to have steering control in a customised car that is using a mitsubishi eclipse steerng wheel with a JVC headunitit worked as advertised with the correct dip swtiches settingbut if you want to do a custon setup, like I wanted first due to the fact that the eclipse wheel only had 6 buttons and I wanted them personalied, programming the unit is not an easy taskin the end I left it as is

Works perfectly and very flexible.

A very nice product with easy to follow instructions