Technical Details: Mode of Stay-Aware Auto-Connect Bluetooth v5.0 Product Type: Bluetooth® 5.0 Over-Ear Connectivity Type A resistance of 32Ω ± 15% 40mm is the driver's diameter. THD: less than 3% Level of Sound Pressure: 91.3 dB Response to Frequency: 20 Hz to 20 kHz 213g in weight