Nuance Ear Speaker You can talk to family and pets while wearing these earphones. Because they don't block your ears, you can hear calls from family members, etc. You can have conversations while wearing the earphones. They're earphones, but they're like speakers. Optimized for open-ear type, they feature a 12mm diameter driver. They use a carbon fiber diaphragm, which delivers rich tones, clear mid-high frequencies, well-defined bass, and a premium sound with a sense of spaciousness. Equipped with NTT's sound leakage suppression PSZ technology Features proprietary PSZ (Personalized Sound Zone) technology. It suppresses "sound leakage," a weakness of open-ear earphones, allowing those around you to enjoy them comfortably. Dedicated app nwm Connect (iOS, Android only) available for free download. With a simple interface, you can check the product status, adjust equalizer settings, update the main unit software, and confirm button operations. Battery Type: Li-ion Battery Battery life: Up to 6 hours (during music playback) * Charging time: Approximately 2.5 hours * Wireless earphones, with a charging case. - Color: White Beige - Accessories: Charging cable Thank you for viewing.