H.A.R.D. Headset Filter

New H.A.R.D. filter to filter out the Radio Frequency pollution coming up the wire across the wearer’s chest.

The H.A.R.D filter allows music and voice to pass through undistorted.  Even on an airtube headset which stops the microwaves getting to your head, the wire across your chest radiates into your body and the filter stops that.

£24.00 inc. VAT


Hydrous Anti Radiation Device

Designed to absorb harmful electromagnetic frequencies, specifically microwave, from 2.4 to 4GHz, from travelling up a mobile phone ear piece cable to the head, where even low power microwave frequencies can potentially cause molecular disturbance in the aqueous and vitreous humour of the eye, the inner ear and brain, potentially causing tumors, carcinomas, cataracts and other radiation related disorders.

Report of the Performance HARD Filter – Nov 26th 2018.



Quality guaranteed with 2 years warranty.

Guaranteed to absorb all microwave frequencies from 800MHz to 4GHz, it contains a powerful dielectric formula based on titanium oxide with a dielectric constant of 10,200ξ.

Compatible with mobile phones and headphones using a 3.5mm audio jack (or Apple Lightening connector and adaptor).

These filters are included in the Oktapus set.