I had the single set, which at that time were with the long wires as connectors, for several years? My husband he agreed after trying mine, far better reception, and we went into the double unit that now are wireless, if I am saying that right. This is my second purchase of the dual unit. We’re happy with the product and service. The last unit received is fine except one receiver has an issue. TV Ears, resolved the issue and you have already sent out a new. Great Service at no additional cost to me! Hopefully We will continue to enjoy TV Ears for many more years! Thank You