LP - 320.

↘ point features: single point type (heart)

↘ frequency response: 40 hz - 18 KHZ

↘ sensitivity: - 45 db / + 1 db (1 KHZ)

↘ maximum sound pressure: 135 db (1 KHZ T.H.D 1%)

↘ signal-to-noise ratio: > 65 dB (1 KHZ, pa)

↘ wire length: 6 meters (imbalance)

↘ power supply: DC9V

↘ mobile phone design, RF radio frequency interference