Weight and dimensions Right earphone weight: 8.7 g Left earphone weight: 8.7 g Charging case weight: 56.4 g Efficiency Wearing style: On-ear Product color: White Headset type: Stereo Application: Calls/Music/Sports/Everyday Product type: Headset IP protection class: IP54 Ports and interfaces Connection method: Wireless Bluetooth profiles HFP A2DP AVRCP Bluetooth: Yes Bluetooth version: 5.2 Battery Input voltage (charging case): 5 V Right earphone battery capacity: 40 mAh Battery capacity (charging case): 600 mAh Battery capacity: 40 mAh Battery charging time (charging case): 1 h Fast charging: Yes Left earphone battery capacity: 40 mAh Microphone Microphone type: Built-in microphone Microphone sensitivity: -38 dB Safety warning Warnings Do not use near sources of heat or fire. Keep away from children. Check the condition of the batteries regularly to prevent leakage. Headphones Frequency response: 50 - 16000 Hz Headphone sensitivity: 96.2 dB Headphone construction: In-ear