A:AnswerIt's a micro end and a USB end. I don't know what a Garmin Instinct is. If it uses Micro, yes it will work. (my Iphone uses a lightening, but the Mosphie /battery cover that is over the Iphone uses a micro end to charge.). You will need a plug to plug into the wall with the USB at the other end.
A:AnswerNot sure on your Sony. I am using this cable to run my Mac book pro into an external dac that goes to my pre-amp. It is doing the job great, good sound and no static noise at all.