In terms of specs, the GTR 4 offers an abundance of fitness tracking features, including over 150 sports modes and the ability to withstand up to 50 meters of water pressure. It also features multiband GPS — a rarity at this price point — as well as a host of sensors for monitoring your heart rate, blood oxygen saturation, and stress levels. It can even last up to two weeks on a single charge, so long as you’re not a power user or rely heavily on the always-on display.

https://www.theverge.com/2023/10/11/23912000/prime-day-best-deals-tech-earbuds-gaming-amazon-october