Size: 53mm; Impendance: 64 15 (f 1KHZ); Sensitivity: 110 3dB; Frequency response: 20-20KHZ; Rated power: 20-30mW; Microphone Size: 6.0×2.7mm; Impendance: 2.2K (max.); Sensitivity: -42 3dB; Frequency response: 100-10KHZ; Type: Omnidirectional; Rated voltage: 2V-10V