Although neat and well thought out, this small FM housing allows me to broadcast the sound of my chain throughout the house (kitchen for Madame, and even upstairs room) in a cubic house of 130 M2 in the country, here's how while respecting the broadcasting laws because such course issuer is clamped and therefore bricolera the SAP. To increase the range has just plug in an extension of approximately 3.5mm 1.50m long, instead of connecting directly to the sound source, this extension will antenna. and the power cord that is permanently connected to the USB port of a small Iphone charger (impeccable and no hum !!) If you are well spread the power cord and the extension of "his", they will do the two antenna you will have a good quality and a good transmission range while respecting the laws regarding the maximum power of such issuer and also without the tinkering. Of course, issue a "hole" frequency FM widest possible first out of respect for your neighbors and to have a quality without interference.,. Note that if you have a small Appar'T there is no need to do all this, it will do as it is. Excellent product, I am delighted
