They do exactly what they say. The instructions aren't very good, but I figured it out and it's not that hard. The materials are durable and work really well once you get used to the feel. A pain in the A$$ to replace the batteries as you have to remove them but that's really a minor complaint. But for the price of 9.99 I think they are better. I'm not sure if the benefits are worth $20
Black Audio-Technica ATH-M50X Professional Grade Studio Monitor Headphones with Detachable Cable - Critically Acclaimed
200 Review
π§ Sony WH-1000XM4 Noise-Canceling Wireless Headphones with Alexa & Mic, Blue
330 Review
Sennheiser HD280PRO: π§ Next-Generation Pro Audio Headphones
260 Review
Global Version HUAWEI Band 6 Fitness Tracker Smartwatch for Men and Women, 1.47ββ AMOLED Color Screen, All-Day SpO2 and Heart Rate Monitoring, 2-Week Battery Life, 5ATM Waterproof - Orange
190 Review