Sandberg HeroBlaster Wireless Headset - Great sound performance Wireless freedom Flexible comfort headband Bluetooth 5.1, Up to 10m wireless range Up to 10 hours playback, Charge time: Approx. 2 hours Charging input: USB DC 5V Battery: Rechargeable 400 mAh Frequency range: 20 Hz 20 kHz, Impedance: 32 ohms, Driver unit: 50 mm Microphone: Frequency range: 50 Hz 8 kHz, Impedance: 2200 ohms, Sensitivity: -40 dB - 3 dB, Directivity: Omni Colorful light on earcup (ON OFF) Više informacija na linku