Bluetooth Version: 5.0 Effective distance: 10 meters Protocols: HFP / A2DP / HSP / AVRCP Microphone: Yes Battery Headphone capacity: 43 mAh (each) Charging case capacity: 300 mAh Autonomy in playback mode: Up to 4 hours (a single charge of the headphones) Up to 12 hours (with all charges in the case) The autonomy times depend on the conditions of use, such as the volume level, the type of file, etc. Headphone charging time: 1.5 hours approx. Charging time of the case: 2 hours approx. Dimensions and weight Headphone dimensions: 26.65 x 21.6 x 16.4 mm Case dimensions: 62 x 40 x 27.2 mm Headphone weight: 4.1 g (each) Total weight: 35.4 g (each) Package content 2 x Xiaomi Mi True Wireless Earbuds Basic 2 (left + right) 1 x Charging case 2 x Pairs of pads (S and L) 1 x User Manual