Product Specifications: Bluetooth version Bluetooth 5.1 Support protocol A2DP, AVRCP, HFP, HSP Bluetooth effective distance 10 meters (barrier-free) Wireless frequency band ISM frequency band: 2.402-2.480GHz Battery capacity 3.7v ===1800mAh, 6.66wH Play time 6 hours (default comfortable volume) Charging time: about 5 hours Speaker size round speaker, φ45mm x1 Speaker impedance 4 ohm Speaker power 5 W Passive diaphragm φ40mm x1 Audio range 20Hz ～20,000Hz Sensitivity 84±3 db Signal to noise ratio 90% Distortion ﹤5% at 1KHz Card port Micro SD card (TF card), maximum support 32G USB interface output DC5V===1A, 5W Shell material ABS, PC+ABS Output power 5V/9V, 1A==2A 10W, backward compatible with 5W, 7.5W, 10W Fast charge Support QC3.0/QC2.0
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