The new L Series units all share a wide tuning range of three standard Lectrosonics blocks, or 67.5 to 76.8 MHz, depending on the specific frequency band, and employ Lectrosonics' patented Digital Hybrid Wireless® technology for compandor-free audio along with compatibility modes for interoperability with older analog systems. Like all our other products, the L Series units are made in the USA and feature machined aluminum housings, user-friendly setup and reliable operation. The ZS-LRLMb kit [or ZS-LRLT kit] makes it easy to put these products right to work on the job. Everything you need is here: transmitter, receiver, mounting hardware, lav mic and connecting cables. Even batteries are included! Check with your Lectrosonics dealer for pricing and availability.