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【500 HRS Standby Time & 38 HRS Play Time】: Built in 300mAh battery, B1 Sports Wireless Headphones with Microphone has great long battery life with 500 hrs standby time and 38 hrs playtime. 1-2 hours quick charge offers enough playtime for music listening or phone calls. Workout headphones bluetooth let you enjoy wonderful music when traveling and doing sports.
【Amazing Sound Quality Stereo】: 13.6 MM super large size dynamic drivers, ensure bluetooth wireless headphones constant and stable transmission. And clear high & low volume makes calls clear and stable. Significant noise cancellation, great choice for you.

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Bluetooth 5.1 and One Step Pairing: With the latest Bluetooth 5.0 chip and compact designed antenna, true wireless earbud has faster transmission rate, lower power consumption, providing fast and stable connection(20m) with no signal loss. No distortion and latency to make your music and phone calls worry free. When taken out from the charging case, bluetooth headphones will pair automatically and reconnect the most recently connected bluetooth device, allowing you to use them with no hassle.
Hi-Fi Stereo Deep Bass and Crystal Clear Calls: Sport wireless headphones adopt DSR lossless HD rendering technology and cvc 8.0 noise cancelling technology, which produces incredible stereo sound quality with crystal crisp treble. The built-in high-quality noice cancellation microphone of the bluetooth earbud can provide you with clear call experience. When you’re on a call, your voice comes through richly and confidently, even in noisy locations.