Beats Flex

Lightweight, you can easily lose them without noticing. The control buttons and the battery and hardware bulges are so small that in winter gloves it's impossible to not only operate them, but even find them on your neck by touch. They connect via Bluetooth to everything they see without asking. But the main issue is the unreliability of the charging scheme. It feels like they conduct USB charging negotiations in the most harmful way for themselves and immediately switch to the maximum mode. God forbid using the USB-C port as intended while charging, that's a guaranteed way to destroy them, regardless if it's from a power adapter, a computer, or a power bank. I burned through three pairs in less than a year this way, and the last ones lasted about three weeks. They will last somewhat longer if you immediately plug in a magnetic dongle from a Chinese Baseus cable and charge them that way. But as soon as the two-color LED starts glowing pink during charging and operation, it's the beginning of the end; the headphones have a week at most left to live. Then they start freezing in strange states, which you might manage to resolve a couple of times with simultaneous long presses on the power and control buttons, but eventually that won't help either, and then they will die permanently. They likely have unresolved issues with water resistance as well, and these are headphones that claim to be suitable for outdoor use and sports. In everything except the reliability of the wires, they lose to any Tronsmart Encore models, and even that's unclear: perhaps Beats Flex dies much earlier before the wires get a chance to break.

Comes with a VERY SHORT usb-c to ucb-c cable. Because of the double-sided USB (which seems like a plus, but it takes time to adapt all devices to this type of connector), you have to plug it into the iPhone block.