Bluetooth version: V4.0 + EDR, Bluetooth operating distance: 10 meters (equal to 33 feet), Frequency range: 2.4-2.48 GHz, Speaker power: 2x 2 mW, Working Current: 30mA, Working voltage: DC 5V, Charging current: DC 5 V 500 mA, Frequency response: 20-20000 Hz, Microphone sensitivity: - 40db, Built-in battery capacity: 100 mAH, Charging time (fully charge): Approximate 2 ~ 3 hrs, Working time: Music time 4 hours, talk time 6 hours, DC 5v charging port: Micro USB.
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