Wireless earphones with Bluetooth 4.1, IPX4 water resistance, and approximately 11.5 hours of playback time. - Bluetooth version: 4.1 - Water resistance: IPX4 - Playback time: Approximately 11.5 hours - Charging time: Approximately 2 hours - Weight: Approximately 12g - Driver size: 10mm Due to the thickness of the box, it will be opened once and shipped in a more compact form. For those who understand, thank you. Thank you for viewing.