Portable Walkie Talkie Earphone TC-801S
Technical Specifications: Microphone size: 6.0*5.2 mm. Frequency response: 20-16000 Hz. Sensitivity: -36dB± 2dB. Impedance: 2.2K ohms. Speaker size: 13mm. Sound pressure level: 84dB ±3dB. Impedance: 32 ohms ± 15%. Audio output: 30mW.