I just installed the TUFF Concepts "Single Din In-Dash Car Stereo FM and MP3 Stereo Radio Receiver Aux with USB Port and SD CardSlot with Bluetooth functional " (was $26 Prime at Amazon) in my (ahem, non-TM content) '86 XR7- (to replace a similar BOSS unit which sadly lasted < 2years) initial thoughts: very similar to the BOSS 612UA (SD card slot, USB port, 3.5mm jack too) it replaced except this model has Bluetooth; surprisingly my Samsung Rugby Pro (2013?) linked right up, and I was able to play music off the phone and even use the tiny remote control to pause, skip, etc songs on the phone havent actually got a call while linked so I'll haveta try that and report back. otherwise typical cheap china quality,, weird display, prolly not really 50w x 4 very shallow & light weight since theres no CD drive (or tape lol) an easy way to get Bluetooth & "Digital" music into a "vintage" car. lmk if anyone wants more details.. ************UPDATE after couple weeks******** 1. doesn't hold your bass/treble/etc settings after it's powered down (yes I have the [always ON] "clock" power lead hooked up) 2. does supply charging at the USB... but so feeble it doesn't actually charge 3. tiny remote needs to be pointed DIRECTLY at the right spot on receiver face to work (kinda comical) 4. doesn't "take" calls on bluetooth but interrupts the music with the ringtone, then you need to answer by picking up yur phone, then talk into the phone's mic while listening on the phone's speaker.. once yu hang up the music starts again OTHERWISE this is working well.. decent power. handles 8G SD cards..