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1 year warranty
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• Two independent channels
• Standard test for air conduction: frequency range: 250-8000Hz, amplitude (SPL) range: 10dB-120dB
• Attenuator: 1/2/5dB
• Allowance: less than 3dBHL
• Amplitude (SPL) range: air conduction in medium frequency: 10 to 12-dBHL, bone conduction medium frequency: 10 to 75dBHL
• Harmonic distortion: air conduction: less than 2.5%, bone conduction: less than 5%
• Static Pressure: TDH 39:4.5N±0.5N, B-71:5.4±0.5N
• Preheating time: less than 10 minutes