2-in-1 Design: Wireless Headphones + Portable Speaker HD Stereo Sound with Dynamic Bass 3 EQ Modes: Classic, VoiceBoost, BassBoost Up to 10HRS Extended Playtime Oversized Memory Foam Ear Cups for a Noise-Isolating Fit Ultra-Lightweight and Comfortable Adjustable Headband Soft-Touch Matte Finish Travel-Friendly Foldable Design Built-In Voice Microphone On-Board and Wireless Controls Aux-Compatible Audio Modes: Bluetooth Wireless, 3.5mm Auxiliary, microSD, FM Radio (Built-In) Play Time: Up to 10 hours (Headphone Mode) / Up to 4 hours (Speaker Mode) Charging Time: 2 hours Charging Port: USB-C Battery Capacity: 400 mAh 7.15 x 7.76 x 3.22 in 7.8 oz Driver Size: 40 mm Speaker Mode Output: 3W Bluetooth Version: 5.3 Connection Range: Up to 33 ft/10 m