USAMS TWS Earbuds – BH Series in-ear headphones with Bluetooth 5.1 technology. The transmission is twice as fast as Bluetooth 5.0, and the connection range is up to 10 meters. They easily handle interference in the 2.4 GHz network. This provides a fast and stable connection with low power consumption. With the battery, you can play music continuously for 25 hours when you regularly charge it through the case. The lightweight design and proper shape ensure comfortable use, and at just about 3.5 grams, you hardly feel any pressure. Enjoy the freedom of using headphones without wires. An integrated remote control for music playback means you don't have to take your phone out, and a built-in microphone allows you to make calls while engaging in your favorite activities or driving.