it cannot connect in stereo like the Jabra does. it can only connect in mono each to one devices (like any standard BT5 realtek based TWS). the Jabra is unique in that because it can connect to two devices. other that the Bose, i don't know any other TWS that does that.
that hook is actually useful, because it cups the ears and creates anchor point, so that clicking the buttons won't jam them deeper inside the ears.
anyway, here's my day one review:
-the fit is great for me. it sits nicely like a CIEM, so the body also touches the ears and provide support.
-slim and sleek looking. the Mifo sits more flush on the ears, but the Mifo doesn't have air vents, so pushing it will create a discomforting vacuum. the Nillkin has air vents.
-because of the air vents, it doesn't create too much isolation. in fact, it only has minimal isolation, like the EX1000 and other open back IEMs. still isolate more than the Sabbat x12, but definitely less than others.
-it has button controls, and similar to sabbat in operation. triple click for volumes.
-the case is really small, but because of the lid design, two handed operation is necessary.
-the case can accommodate normal sized eartips and still charge. i use settled for Symbio peel on mine for now.
-the sound is similar to my ER4XR, which is a great surprise. the ER4XR has leaner midbass while the Nillkin has a slight thicker midbass. the Bass on the Nillkin is not boosted at all, similar to the ER4XR, and about the same level as the mids, but the extention really go deep, not cut off like the Mifo pro. treble is sparkly and bright like the ER4XR. soundstage is also similar: intimate player position while maintaining good soundstage/room size information. if the T1C is like listening to car stereo/movie theater, the Nillkin is like listening to monitor speaker up close. the speed/dynamic of the presentation is also snappy, fast and closer to BAs like ER4XR than the bloomy dynamic drivers of the T1C.. heck, it's even faster and clearer than the Earin M2, which is clearly uses BAs
-battery tested: i listened to it from 8PM, and it says battery low at around 2AM. i did listened in a low volume though that later hours.
this is definitely my new go to TWS
i don't know if the chrome T1 uses the same tech. i also found this, similar to the Nillkin and chrome T1 in shape:
https://m.aliexpress.com/item/32955906832.html
the chrome and Nillkin is much more similar though