Sierra Tech Specs
Headphone Impedance: OFF Mono-180 Ω, ON Mono-300 Ω, OFF Stereo-250 Ω, ON Stereo-600 Ω, All @ 1kHz
Speaker Frequency Response (Active) :20Hz to 20kHz (volume sliders max)
Microphone Electret: Bias: 8-16V (Not polarity sensitive), Bias Resistance: 220Ω-2200Ω
Sensitivity Electret: 20mV-80mV across 8-16V, Bias Re: 94dB SPL input at 6mm
Frequency Response: 200Hz-6000Hz
Maximum SPL for Microphone: 114db
Power Source: Battery: 3V, 2(AA) Alkaline batteries
Maximum SPL for ANR: > 120dB @ 100Hz
Weight:16 oz. / 453.59 grams, Bluetooth Enabled Phone, Bluetooth Streaming Music