These appear to compete directly with Xiamomi pistons, but as of now there are no reviews or tests.
If you need a cheap pair of IEM for listening to audiobooks or casual music listening, they might be a good option for $15.
Not to be confused with Fischer Audio Silver Bullets. Poor product name choice on behalf of OnePlus IMO. Not so original.
Sensitivity 108dB (at 500Hz)
Maximum Power 20mW
Wire Environmental TPE, 1.1M
Convenient and Responsive Remote Command the One and your music without the need to keep your device on hand. The three-button in-line remote with microphone provides responsive control for music, calls, and even your camera. Answer the phone, take a selfie, pause, play, and skip to your favorite tracks or change volume by simply pushing a button.