ZT-003K Bluetooth Hearing Amplifier With  Remote Microphone 2-in1  

• Bluetooth Version: 5.3
• Frequency response range(Hz): 250-6000
• Equivalent input noise(dB): ≤18+3
• Total harmonic distortion: ≤3%
• Maximum saturated sound pressure level OSPL90(dB): 115±3
• High frequency average OSPL90(dB): 110±3
• HFA Full of Gain(dB): 35±5
• Hearing Amplifier Battery capacity: 180mAh
• Hearing Amplifier Working time: 15H
• TV Adapter Battery capacity: 300mAh
• TV Adapter Working time:  15H