[Ira Delphic]

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.
 
mpedance    32Ω+/-15%
Sensitivity    108dB (at 500Hz)
Frequency    20Hz-20000Hz
Maximum Power    20mW
Connector    3.5mm
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.

 
 

 

[djvkool]

Wow, a button on the inline remote to take a selfie?

 

[Ira Delphic]

Still no reviews for this budget IEM...

 

[MrTechAgent]

Man the rate at which these companies are making dynamic phones is interesting.
Gotta love China, get some BoPET..some coils, a Hydraulic press put it under UV and you're in business.

 

[Ira Delphic]

And KZ is leading the charge. The most prolific IEM manufacturer on the planet. And known as a good value for 7-$15 depending on the model, according to some members on Head-fi.