♫【HiFi Sound & Unique Bass Up】This UNIX Bluetooth headphone is a built-in 40mm large moving coil, bringing you stereo high-fidelity sound effects. Unique and powerful bass, clear voice calls, and crisp treble form a perfectly balanced sound, allowing you to experience the theatre version of the music experience. ♫【Wireless & Bluetooth Design】This over-ear headphones have a built-in Bluetooth 5.0 + EDR, which has a faster transmission speed than ordinary headphones, lower power consumption, and a more stable connection, allowing you to get a better and clearer music experience. The Bluetooth connection distance can reach 10 m/33 ft. ♫【Clear Calls & Voice Assistance Activation】Unix Elite 9 Bluetooth headphones will give you ultimate convenience, easily making calls on the headphones. Unix headphones are your perfect choice for home, online courses, study, travel, commute, business meetings. ♫【Long Battery Life & Portability】Our Unix wireless headphone is a built-in 200mAh battery capacity, which can be charged quickly and can provide 8 hours of playtime after 4 hours charged. The earphones can be folded and equipped with a leather storage bag for carrying and storing conveniently. It is ideal for you to enjoy music at home, business, study, or sports.