The market for fitness-tracking technology is unarguably saturated. For wearables alone, we have Fitbits, Jawbones and most recently, the Microsoft Band. But a new wristband tracker from Chinese manufacturer Huawei might be the strangest we’ve seen yet. It’s called the TalkBand B1, and while it comes with many features you’d expect from a fitness tracker, the OLED display can actually be removed from the band and used as a Bluetooth headset for phone calls.