Bluetooth: BLE v5.0Bluetooth IC: Qualcomm QCC3020BT profiles: HSP/HFP/A2DP/AVRCPCharging voltage: DC 5V (Type C)Charging time: 1.5 hoursPlaytime: 5 hoursSpeaker Diameter: 6mmSensitivity: 95+/-3dBAImpedance: 16 ohms +/-10%transmitter power at 2.4GHz - 2.4835GHz: 2.5mWCharging case capacity: 400mAh (Lithium polymer)Headphone capacity: 40mAh (Lithium polymer)Charging case dimensions: 61 x 52 x 30 mmHeadphone dimensions: 19 x 23 x 27mmCharging case weight: 38 g