Model Number: M90 Pro Style: Earbuds BT Version: 5.0 Function: Power Bank Battery capacity: 1200mAh earbuds battery capacity: 40mAh Charging time: 60minutes Battery Indicator: Digital Display call time: 5-7 hours BT Version: V5.1 Transmission Frequency: 24GHz band(2.4000-2.48356) Receiving Distance: 15 meters (under standard environment) Working temperature: -10 c-50 c Charging frequency of the charging box: about 3 times
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