Bluetooth 5.3 and One-Step Pairing: Wireless headphones uses advanced Bluetooth 5.3 technology, supports HSP, HFP, A2DP and AVRCP, signal transmission faster, more stable and lower latency. After pairing for the first time, just open the charging case and your devices will connect automatically(Hall switch). Provide you with a more stable connection and perfect audio and video synchronization.Professional Audio and Comfortable: Our Bluetooth headphones adopts AAC+SBC audio decoder and 13mm moving coil unit, which increases the frequency bandwidth by 25%, resulting in unique Hi-Fi sound. Different from in ear headphones, semi in-ear headphones weigh only 4g, which is lighter and more suitable for the structure of the human ear.40 Hrs Playtime, Fast Charging: With a built-in 35mAh battery in each wireless earbuds, you can talk or listen to music for up to 6-8 hours on a single charge. The portable charging case provides a quick 1.5 hour charge and with a built-in magnet for added retention, you can use it for up to 40 hours to meet your needs.LED Battery Display and Refined Appearance: Bluetooth earphones feature a smart digital LED display that accurately displays the remaining power in digital format. At the same time, the exterior of the wireless earphones is 100% gloss-coated for smooth lines, a soft touch and a sophisticated look.Sensitive Touch and IP7 Waterproof: The Bluetooth earbuds adopts a high-precision touch chip for touch control. Just touch the outer surface of each ear bud with your finger to quickly implement all functions, such as voice assistant, power on/off, music play/pause, volume +/-, calls, etc. In addition, the ear buds are made of IP7 waterproof material, which is sweat-proof and rain-proof.