2022 Bluetooth 5.3 Upgrade and One-Step Pairing: Bluetooth headphones use the most advanced Bluetooth 5.3 EDR technology, which offers a more stable connection, faster pairing and universal compatibility. When the charging box is opened, the headphones are automatically paired with each other (hall switch) and connected to the last connected device. Bluetooth 5.3 makes the transfer more efficient. You can enjoy music anytime and anywhere. Clear stereo sound and CVC 8.0 noise reduction: J52 in-ear bluetooth headphones have a built-in 13mm graphene audio driver and a chip with AAC Audio codec that makes the high full dynamics and the bass powerful. Built-in high-quality microphone and HD lossless rendering technology to give you an incredible music experience. Advanced CVC 8.0 noise reduction technology can effectively monitor and suppress ambient noise for clearer conversations. Dual LED digital display and 42 hours of uninterrupted music: These bluetooth in-ear headphones, which with a unique intelligent digital LED display accurately displays the remaining power in digital format. The Bluetooth headphones provide up to 7 hours of high-quality sound on a single charge, and the included charging case offers an additional 5 charges, allowing for a total of 42 hours of playtime. It only takes 1 hour to charge thanks to the Type-C charging port. Ultra-light and comfortable fit: The surface and angle of the in-ear part of the Bluetooth sports headphones have been polished and refined several times to achieve a balance between beauty and comfort and to ensure a comfortable fit. The in-ear headphones weigh only 3 g, so they do not put any strain on the ears. IP7 waterproof technology effectively protects sports headphones from sweat and rain damage during exercise, work and commuting. Sensitive touch control and dual mode: Wireless earbuds use humanized fingerprint sensor, aluminum touch surface and Bluetooth 5.3 for quick response. Just touch the Bluetooth headset to play/pause music, change song, volume +/-, answer/end calls and activate voice assistant. The two earbuds can be used individually or in dual-channel mode, and each earbud can be paired independently.