Quality, Reponsive Customer Service. AKG Audio DMS100 Digital Wireless Instrument w/ SR100 Stationary Receiver, Black. Item has been opened and is in the original retail packaging. Item shows virtually no signs of wear. Item has been professionally tested and inspected to ensure complete functionality. AKG DMS100 professional digital wireless systems for performers and presenters combine signature AKG sound quality and rock-solid, license-free 2.4GHz operation with advanced security features, extended battery life, and the ultimate ease of use. The bodypack is instrument-ready and can also be combined with a wide range of AKG headsets or clip-on mics (available separately) for singers or presenters. Leveraging over 70 years of AKG microphone engineering and 24-bit/48kHz uncompressed audio coding, with none of the interference found in analogue wireless systems, the DMS100 provides crisp, studio-quality sound. Combined with ultra-low latency, the DMS100 is a joy for singers and instrumentalists. And with the unrivalled signal security provided by AES 256-bit encryption, presenters can feel at ease in confidential settings. Seamless setup and operation of up to four simultaneous, co-existing Dms100 systems. 30M (100ft) operating range. Up to 12-hour battery life using 2x AA batteries. 24-bit, 48kHz digital audio resolution. Optional rack mount kit available. AKG Pro Audio DMS100 Digital Wireless Instrument System with SR100 Stationary Receiver and PT100 Beltpack Transmitter, Black.