Sony WI-C100 wireless in-ear headphone

• Driver Unit: 9mm Dynamic Driver • Impedance: Not specified • Frequency Response: 20Hz – 20kHz (Bluetooth communication) • Bluetooth Version: 5.0 • Battery Life: Up to 25 hours (music playback), 15 hours (continuous communication) • Charging Time: Approx. 3 hours • Charging Method: USB • Water Resistance: IPX4 (Splash-resistant) • Additional Features: Digital Sound Enhancement Engine (DSEE), Volume Control, Lightweight design