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Bluetooth Version : 5.0+EDR | Rated Power : 30mW | Frequency Response : 100 Hz~6.8KHz | Horn Unit. : Moving Coil type iron shield magnetic horn | Impedance : 150 ± 5 Ω | Sensitivity : 110 ± 3dB ( 1KHz1mw ) | Degree of Distortion : 1% | Transmission Distance : 18 Mtr. | Charging Port : Micro | Battery Capacity : 210 may Lithium Polymer | Standby Time : 336 Hrs | Work Hrs. : 23 Hrs | Weight : 99g For More to Read