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Regrsi RE-NY032 Wireless Neckband Bluetooth Earphone Earphone version-NY032 Profile Support-HSP HEP.A2DP.AVRCP Stan-by Time-400h Talk Time-9h Music play Time-8h Charging Time-2h Charging Voltage-DC 5V Frequency Range-2.402G-2480G Ambient Temperature-20/+60C Transmission Distance-10m Battery Capacity-110mAh. 3.7V Sensitivity-90dBt3dB Impedance-16π+15% Frequency Response-20-20000Hz