The U.S. Department of Homeland Security (DHS), National Urban Security Technology Laboratory (NUSTL) is seeking information on commercially available Mission Critical Push-to-Talk Systems. This information is being sought for the DHS Science and Technology Directorate’s System Assessment and Validation for Emergency Responders (SAVER) program which provides information on commercially available equipment to assist response organizations in equipment selection and procurement. The SAVER program develops knowledge products and conducts objective, practitioner-relevant, operationally oriented assessments and validations on commercially available equipment and systems. Relevant information will be shared nationally with federal, state, local, tribal and territorial response agencies. For further details on the SAVER program, visit the SAVER website at https://www.dhs.gov/science-and- technology/saver.