Product Description Product Model:HJ-2021 Digital display Product power：3w Input voltage: 5v-(USB) Battery type: 14500 Li-ion 3.7v 800mA Charging time: 1.5 hours Use time: about 60 minutes (depending on personal use) Touch switch, one touch power on, feel the convenience of digital products Universal USB charging setup with TYPE-C charging port. Large capacity lithium battery design for long life and fast charging 4-position limit comb adjustment, free to choose according to different needs

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