These earbuds are compatible with all mobile phones, including Bluetooth, tablets, notebooks, universal mobile phones. Specification Response frequency (Hz): 20-20000 Features1: This is a newest tws Bluetooth earphones Impedance (ohm): 32Ω Features 2: 2019 Wireless Bluetooth Headphones Sensitivity (dB): 108dB Talk time (H): 2-3 hours The talk time and music time of this tws is about 2-3 hours once fully charged
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