Technical Details Version 5.0 of Bluetooth Profiles for Bluetooth: A2DP, AVRCP, HSP, and HFP ç13mm is the driver diameter. Rating of Input: 5V/1A 32Ω is the impedance. Rate: 20 Hz–20 kHz Noise reduction frequency: 28–35 dB One hour is the charging time. ANC ON: 38 hours; standby time: 70 hours 35 hours of playback time and 30 hours of ANC on 220 mAh is the battery's capacity. Type of Battery: Li-Polymer Distance of Operation: 10 M Type of input port: USB-C