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The i7s twins wireless in ear mini bluetooth headphone with exquisite design will give you a better experience. Multi button control will make it easier for you to use the product. Metal dust net.The metal dust screen prevents dust from entering the headphone hole and interferes with your experience. Dual mode bluetooth v4.2, ultra-low power consumption.This device can be quickly paired with smart phones, as well as a variety of bluetooth devices. Bluetooth maximum transmission distance of 12 meters. Built in high performance lithium battery 65mah, enjoy about 4 hours of phone time, standby time of up to 120 hours.