BeskrivelseIbrain Air Tube Caller Headset With Low EMFAir Tube caller head phones especially designed to reduce mobile phone radiation. Low EMF wire specially designed to lower electricity and magnetic fields using the best possible modern technology.Airtube channel with sound.Airtube channel with no electricity.The manufacturer Ibrain has patents in 8 different countries for inventing radiation free headsets.Material: Plastic and metal.Ear-Cushion: Sponge/ Cloth/Silicon.Earphone around the ear: Plastic and metal.Wire: Copper.Use:Mobile Phone, Computer, landline telephone, and smart phones.Port:The headset comes with three different port solutions.Mini jack: Used as normal headset and earphone. For smart phones, tablets, computers etc.USB:  Used for computers.RJ9: Used for most standard landline phones.Colours:blackPlease note:Please note that the RJ9 port for landline phones fits most landline phones but not all. Ehsshield has no data upon which landline phones fits with this port or not.