Speaker Diameter: 40 mm Speaker Sensitivity: 112 ±3 dB/ 1 KHz Speaker Impedance: 32 ±15% Ω Mic Sensitivity: -40 ±3 dB/ 1 KHz Mic Polar Pattern: Omnidirectional Mic SNR: 60dB Operating Current: 115mA (at 5V) Headset Plug: 3.5mm 4-pole jack Cable Length: 1.2m/ 3.94 ft