Driver Unit (mm) 10 mm (3/8 in), Graphene coated Magnet Type Neodymium Frequency Information 20 Hz - 20 kHz Control/ Mic Touch sensor / MEMS Mic Playback Time with Battery (AAC) Headphones: Approx. 6.5 hours (NC ON)Headphones with Charging cradle: Approx. 19.5 hours (NC ON) Charging Time (25°C/ 77°F) Headphones: Approx. 2 hoursCharging cradle: Approx. 2.5 hoursHeadphones with Charging cradle: Approx. 4 hours Quick Charge (15 minutes, AAC) Headphones: Approx. 70 minutes (NC ON) Continuous Communication Time Headphones: Approx. 4.5 hours**May vary depending on smartphone. Waiting Time Headphones: Approx. 7.5 hours (NC ON), Approx. 12 hours (NC OFF, Auto power off does not work) Weight Headphones: Approx. 7 g (one side only: L and R are the same)Charging cradle: Approx. 65 g Supplied Accessory USB charging cord: Approx. 0.5 m (1.6 ft) (Input Plug: USB A Shape, Output Plug: USB Type-C Shape), Earpieces set: XS, S, M, L, XL (M attached) Bluetooth® Wireless Technology Version 5 Supported Profiles A2DP, AVRCP, HSP, HFP Codec SBC, AAC Operating Distance Up to 10 m Trademark Notice: Trademark Notice: The Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of such marks by Panasonic Corporation is under license. Other trademarks and trade names are those of their respective owners. Water Resistance IPX4 Equivalent (Headphones only)Specifications are subject to change without notice. All numbers given here are approximate. Water resistance specifications are equivalent to IPX4 of IEC 60529.