Bluetooth earphones, version 5.2; True Stereo earbud system 40mAh 400mAH 3.7V lithium battery for earbuds Headphones Approximately 1.5 hours are needed for charging. Headphones Approximately 4.5 hours were worked. Working time of the charging box twice Headphones Waiting period of roughly 300 days Active Noise Cancellation (ANC), ENC calls, support AAC, mSBC high-quality decoding, TWS communication, power consumption and efficiency balance, and touch multifunction (answering, cutting songs, hanging up, volume adjustment) are all supported by the operation of the earbuds.