Go 2/ S Necklace, Ergonomic Oval Shape Silicone Device Holder Fits for Go 2&S Posture Trainer, Anti-Lost Necklace Accessory(White)

This after market necklace works, but it does not lie flat around the neck and has an awkward shape. It was about half the cost of the genuine Upright lecklace, so I gave it a chance. I used it a couple of days. However, I have since replaced it with the Upright brand necklace.