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.
π§ Huawei FreeBuds Pro Earbuds with Advanced Noise Cancellation, Bluetooth 5.2, and 3-Mic System for iOS and Android (Carbon Black)
295 Review
π§ HUAWEI Freebuds 4i: Wireless Earbuds with Active Noise Cancelling & 10H Battery Life in Black
279 Review
Upgrade Your Music Experience with XiaoMi True Wireless Earphones 2 Basic - Longer Battery Life and Superior Sound Quality (White, International Edition)
341 Review
Upgrade Your Audio Experience with Samsung Galaxy Buds+ Plus: True Wireless Earbuds with Improved Battery and Call Quality in White, including Wireless Charging Case and Velvet Pouch.
320 Review
Massdrop x Koss Porta Pro X On-Ear Headphones: π§ Noise-Cancelling Mic, Voice Assistant, Track Skip | Collapsible Midnight Blue
314 Review
New White Marshall Minor II In-Ear Bluetooth Headphone
101 Review
Panasonic RP-HS46 Slim Clip-Type Earphones in White: Quality Sound On-the-Go
76 Review
Black Panasonic RP-HJE125E-K Wired Earphones π§ with 3.5 mm Jack
359 Review