Redmi Buds 4 Light: Each earbud weighs 3.92g and measures 32.24 x 18.22 x 19.63 mm. Weight of charging case: approximately 26.7g Size of charging case: 55.6 x 47.3 x 22.2 m Weight in total: 35g Getting charged: 35+320 mAh battery Earphones: 90 minutes; charging case: 120 minutes Port for charging: Type-C Input parameters for earbuds: 5V ⌓ 50mA The charging case's input and output parameters are 5V ≓ 350mA and 5V ⋓ 150mA, respectively. Relationship: Bluetooth 5.3 is the wireless connection type. Bluetooth protocols include HFP, AVRCP, and A2DP. 10 meters is the operating distance. 32Ω is the speaker impedance.