1, Very convenient installation, no need to modify the existing pipeline. Maintenance free. For product quality problems within 180 days, please feel free to contact us at any time, there will be no after-sales troubles. 2, Helps prevent build-up of lime scale and dissolve existing deposits. Prevents limescale build-up. Reduces existing limescale. Showers, taps, etc. easier to clean. Intelligent electromagnetic pulse wave, chemical-free and salt-free. 3, Support for diameter 0.5" to 1.6" metal(except iron) or plastic water pipes. 4, Solid state electronics and twin coils design. ABS casing. 12V DC mains adaptor, cable length 5 feet. 5, Packing list: 1x Electronic descaling device. 2x Induction coils. 1x 12VDC mains adaptor. 2x Fixing screws. 4x Cable ties. NOTE: the place where the wires are wound can't use iron pipe, otherwise the effect of the product will be weakened. But the place outside the winding of the wire can be an iron pipe.