Technical specifications of Hoco EW77 Type of headphones: Vacuum; Moisture protection: No; Speaker (microphone): Yes; Additional features: Hi-Fi Audio; Bluetooth: 5.4; Headphone battery capacity: 30 mAh; Charging case battery capacity: 300 mAh; Working time: up to 4 hours; Size and weight: 60.6*45.2*21.7mm, 57.6g.
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