Headphone Headset Anti-Radiation Radiation-Free Telephony with 3.5mm Jack

Headset with 3.5mm jack for mobile phones etc.
The permanent alternating magnetic field of loudspeakers with the interaction of the magnetic field can damage the brain and eardrums. 
To solve this problem, the FH1This headset uses an electromagnetic radiation attenuation principle with quadruple anti-radiation technology, including metal shielded wires, air tube, non-magnetic speaker and passive microphone. This extends the distance between the radiation source and the human body, which largely reduces electromagnetic radiation and achieves a great anti-radiation effect. Ideal for call centres, business or private use.

Microphone type: low-noise electret microphone
Microphone sensitivity: -42dB
Microphone impedance: 2.2kΩ
Loudspeaker diameter: 16 mm
Listening power: 50mW
Loudspeaker impedance: 150Ω
Frequency response curve: 200Hz-4000Hz
Length: about 2.0 metres
Weight: about 60 grams (without line)
Air tube length: 250 mm