Bluetooth 5.3 and built-in microphone Bluetooth 5.3 technology and two 40mm drivers provide stable connections, lower latency, and superior sound quality for an enhanced audio experience. The built-in microphone enables clear, hands-free calling. 6EQ modes and Hi-Fi stereo Enjoy six sound modes: Pop, Classical, Rock, Jazz, Bass, and Clear. The Hi-Fi stereo function delivers crisp, high-resolution audio, enhancing your music and movie listening experience. Long battery life and dual mode Up to 40 hours of playback time in Bluetooth mode. With dual-mode functionality and a 500mAh battery, seamlessly switch to wired mode for continuous music enjoyment. Comfort and lightweight design Ergonomically designed with ultra-soft ear cushions and an adjustable headband for long-lasting comfort. The ear cushions provide a skin-like feel, ensuring a comfortable fit during extended use. Lightweight and foldable for easy portability. Product specifications: Version: V5.3+EDR Transmission range: 10m Driver size: 40mm Frequency response: 20Hz-20kHz Charging: USB Supported modes: Bluetooth / TF (supports up to 32GB) / FM / 3.5mm AUX What's in the box: 1 x Wireless Bluetooth over-ear headphones 1 x User manual 1 x USB charging cable High-quality sound: Hi-Fi wireless headphones deliver deep bass and clear treble for an immersive listening experience. Bluetooth 5.3 technology: Ensures fast, stable wireless connections and low latency for smooth music and video streaming. Comfort and ergonomics: Skin-like ear cushions and an adjustable, foldable design offer maximum comfort for extended wear. Portable and adjustable design: Ergonomic headband adjustment and soft ear cushions provide a secure, comfortable fit, ideal for travel, commuting, or daily use. Long battery life and dual mode: Rechargeable battery with dual-mode support allows for extended playback, perfect for use at home or on the go.