Men's Bluetooth Beanie and Neck Warmer

material: Wool

1. Bluetooth specification: V4.2 2. Frequency range: 2.4026GHz-2.480GHz 3. Transmission distance: 10-15 meters 4. Channel: Stereo 5. Speaker parameters: 24 ohms / 30mm 6. Speaker power: 10 mW * 2 7. Signal to noise ratio: 102dB