Model Number: TE-SP201-K 

Technical Specifications:

Microphone:
Type: Electret microphone
Impedance: 2.2KΩ
Sensitivity: -36dB+/--2dB
Frequency response: 20Hz-1.6KHz
Wire durable tempature: -40-100 degree
Material:High quality & Unbreakable
Special features: Heavy duty, dustproof, clear sound

Speaker
Impedance:8Ω+/-15%
Sound pressure level:82dB+/-3dB
Frequency response:200Hz-3.5KHz
Audio output :2W