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Interface standard: USB 3.0 USB 3.0, USB 2.0 and USB 1.1 compliant Supports SuperSpeed (5 Gbit/sec), high-speed (480 Mbit/s), full-speed (12 Mbit/s) transfer rates USB 3.0 connectors: 3 USB 3.0 A-female 7 switchable LED colors by one touch switch Learn More

Bluetooth & Charging: Bluetooth 4.1 Supports A2DP, AVRCP, HFP, HSP 10m wireless range Bluetooth frequency range: 2.4 GHz-2.4835 GHz Up to: 10 hours playback / 13 hours talk time / 250 hours standby time Charge time: Approx. 5 hours Charging input: USB DC 5V Battery: Rechargeable 380mAh Li-polymer battery Earphone: Frequency range: 20 Hz – 20 kHz Impedance: 32 ohms Sensitivity: 108 dB Driver unit: 40 mm Microphone: Frequency range: 30 Hz – 16 kHz Impedance: 2200 ohms Sensitivity: -52 dB Directivity: Omni Learn More