None. I would like to complain about missing parts or a defective battery. But these suck! Even for $20 they should be better! They would turn on and off with such a crackle and noise that it was unbearable to hear. I turned them off and on again and could hear 1/2 to 3/4 of the song before it started again. I literally held my Fitbit Versa 2 to my head, hoping that maybe Bluetooth (which I can understand) was too cheap for this quality technology. Therefore, I will NOT only recommend new Fitbit products.
🎧 Huawei FreeBuds Pro Earbuds with Advanced Noise Cancellation, Bluetooth 5.2, and 3-Mic System for iOS and Android (Carbon Black)
295 Review
Upgrade Your Music Experience with XiaoMi True Wireless Earphones 2 Basic - Longer Battery Life and Superior Sound Quality (White, International Edition)
341 Review
🔴 Sleek Mystic Red Samsung Galaxy Buds Live with Active Noise Cancelling - Wireless Earbuds
274 Review
🎧 HUAWEI Freebuds 4i: Wireless Earbuds with Active Noise Cancelling & 10H Battery Life in Black
279 Review
New White Marshall Minor II In-Ear Bluetooth Headphone
101 Review
Sony MDR-ZX310AP ZX Series Blue Wired On Ear Headphones with Mic: Immersive Sound Experience
48 Review
Black Panasonic RP-HJE125E-K Wired Earphones 🎧 with 3.5 mm Jack
359 Review
Bose QuietComfort 25 Acoustic Noise Cancelling Headphones with 3.5mm Wired Connection for Apple Devices - Black
43 Review