Signal-to-Noise Ratio (SNR)
Operating keys
Answer/end call
Mute
Volume +
Volume -
Sound pressure level (max)
Operating temperature (T-T)
Operating relative humidity (H-H)
Products per master (outer) case
Master (outer) case length
MEMS (Micro-Electro-Mechanical System) microphone
Total Harmonic Distortion (THD)