Momentum HDM100 Mulitmode DMR Series mobile radio. This radio is a software defined mobile that integrates impressive performance with durable construction to support a wide range of user requirements and applications. The Momentum series radios are available in VHF and UHF frequency bands. Spectrally efficient TDMA technology small, compact size Large on/off volume and channel selector knobs Integrated GPS FCC Narrowband compliant IP57 submersible and MIL-STD 810 C, D, E and F compliant Voice annunciation.