Bluetooth headset folding card headset

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Model: 450BT-B Audio input: 3.5mm jack type Speaker horn: 40mm steel magnet Sensitivity: 115±3dB Withstand power: 25mW Frequency range: 20-20KHz Impedance: 24Ω Microphone: support Frequency range: 30Hz-16KHz Sensitivity: -58±3dB Bluetooth version: V5.0 Transmission protocol: EDR+A2DP Transmission coding: SBC Noise reduction technology: DSP+AEC Frequency range: 2.402~2.480GHz Effective transmission distance: 10 meters Transmit power: 5dBm Battery capacity: lithium battery 200mHA Charging current: 5V 500mA Charging time: Show more