This SIEMENS GIGASET Repeater is an excellent product that increases the reach of your phones without fil.Je can now receive communications in an annex of my distant home about 100m from my principal residence and with thick walls on both others, which was impossible before. Only drawback, poorly written installation instructions, I had to contact the GIGASET service to help me set this Repeater. This service contacted by phone me immediately and very kindly sent an email explaining the installation and everything went smoothly. Apart from the difficulty of installation, I highly recommend this product.