
Two headphones worked at different volumes. The microphone side was softer than the opposite side. This made the headphones almost useless as headphones (the difference was so obvious). They can really only be used with one ear, making them mono (not stereo).

Headphones Sennheiser CX 300-II, black
318 Review

Black Huawei FreeBuds 3 Wireless Bluetooth Earbuds for Superior Sound
276 Review

Upgrade Your Music Experience with XiaoMi True Wireless Earphones 2 Basic - Longer Battery Life and Superior Sound Quality (White, International Edition)
341 Review

Huawei Freebuds Pro MermaidTWS with Active Noise Cancellation - Silver Frost
299 Review

Bose QuietComfort 25 Acoustic Noise Cancelling Headphones with 3.5mm Wired Connection for Apple Devices - Black
43 Review

Massdrop x Koss Porta Pro X On-Ear Headphones: π§ Noise-Cancelling Mic, Voice Assistant, Track Skip | Collapsible Midnight Blue
314 Review

Black Panasonic RP-HJE125E-K Wired Earphones π§ with 3.5 mm Jack
359 Review

New White Marshall Minor II In-Ear Bluetooth Headphone
101 Review