Technical Details: Quick Charge: 10 minutes equals 4 hours Stay-Aware Mode for Skullcandy App Compatibility Auto-Connect Flat-folding and collapsible design with Bluetooth® v5.0 Product Type: Over-Ear Bluetooth® Connection Type: 5.0 Bluetooth® Impedance: 32Ω ±15% 40mm is the driver's diameter. Sound Pressure Level: 95–100dB THD: <1%@1K Regularity Reaction: 20 Hz to 20 kHz 312g in weight