The WFXB700 have seriously pwerful EXTRA BASS which gives punchy low-end sound - bass lines have never sounded so good. Their Bluetooth is stable and reliable. The sound is transmitted simultaneously to both ears for outstanding listening. Battery life can be up to a massive 18 hours thanks to the charging case that comes supplied and a 10 minute charge can deliver 60 minutes listening! The WFXB700 are rated IPX4, so liquid splashes and sweat won't stop them -you can keep moving to the music, whatever you're doing! Easy hands-free calling and voice assistant compatible. The earbuds are ergonomically designed to fit your ears comfortably and securely.