This ultra-thin cord is less than half the thickness of standard telephone line cords: only 1.1mm. It's easy to hide under carpet or rugs or along walls or around doors or windows.
Despite its small size, it's strong and well made for long life and high quality conversations. It has standard modular plugs on both ends, with gold-plated pins to minimize corrosion that could cause static. Four conductors for use with most phones.