The charging cord shipped with
The charging cord shipped with my unit was a USB-C to USB-C cord and works only with newer iphone a/c chargers. I have a 6s. I had never heard of USB-C. Neither my iphone a/c charger nor my 3 year old HP laptop has a USB-C port, so I had to purchase a separate cord with the USB-C on one end and the traditional USB-A on the other end, which works well. I regret I had to go to the extra expense and this delayed my ability to use my new Go 2, as I didn't know if it would arrive charged (it was). It would be better under the shop-now description of the Go 2 to explain the different types of charging cords with pictures) and allow the purchaser to choose the appropriate charger cord for one's situation, so the inappropriate cord is not sent out with the unit. I ordered my Go 2 and necklace on Dec. 31 and couldn't get going until Jan. 23, which was disappointing. All of this said, after only one day I already love my Go 2 with necklace. It and the necklace are top-notch products. The phone app is easy to download and is very useful. I love being able to adjust so many parameters to maximize my experience and look forward to the benefits this product will give me.