Technical Details: Touch controls for volume, track, and calls Use Either Bud for a Noise Isolating Fit Auto-On/Connect Solo Type of Product: True Bluetooth® 5.2 is the wireless in-ear connection type. A resistance of 16Ω ± 15% 6mm is the driver diameter. THD: less than 3% Level of Sound Pressure: 105 dB ± 3 dB Response to Frequency: 20 Hz to 20 kHz 23.6g in weight Bluetooth v5.2