Model : OnePlus Nord buds 2 Code : E508A Color : Thunder Grey , Lightning White Size Earphone Size : 27.5*21.05*24.4mm Case Size : 67.99*28.9*35.5mm Weight Weight of Earphone : 4.7g Weight of Case : 37.5g Vocalize Driver : 12.4mm Dynamic driver Driver Sensitivity : 108±1.5dB at 1KHz Frequency Response range : 20Hz~20KHz Number of Microphone 2 Microphones Microphone Sensitivity -38dBV/Pa Bluetooth Bluetooth Codec : AAC /SBS Bluetooth Version : 5.3 Bluetooth Range : 10m Endurance Battery Type : Rechargeable Li-ion battery Battery Capacity : 41mAh(Earphone), 480mAh(Case) Music Play Time (ANC OFF) : 7h (Only Earphone) / 36h (With case) Music Play Time (ANC ON) ) : 5h (Only Earphone) / 27h (With case) Talk Time (ANC OFF) : 3.5h (Only Earphone) / 17h (With case) Talk Time (ANC ON) : 4h 5h (Only Earphone) / 19h (With case) Charge Charging Time : 60min(Earphone) ; 90min (Earphone+case) Charging Port : USB Type-C Function Call Function : 2 mic+AI algorithm Wear Testing : Support Pairing Popup : Support Dustproof and Waterproof Grade : IP55 Noise Reduction Depth 25dB Active Noise Reduction : Support Whether to Support OTA Upgrade : Support ITEM IN THE BOX: Earphone with case , charging cable, A pair of S, M, L Earmuff each