ZS-LRLT is a single channel kit with a LT transmitter, a LR receiver, mosquito, cables and holder. Everything you need to get started simply. The L series uses Lectrosonic's three frequency blocks and their patented Digital Wireless technology. In addition to avoiding companders, you can also use them together with other (older) analog systems. They are also built with Lectrosonic's incredible quality. The products are made of turned aluminum and can basically be driven over by a car.†