Streaming's MDVR-A16 mobile DVR has a built-in amplifier that directly connects to bus speaker systems for audio playback. Hot keys activate remote controllers and multimedia to playback directly from two built-in SD cards so that updates can be done directly from USB thumb drives. Playback log recording files can be transferred via built-in WiFi modules. Benefiting from H.264 compression, the product provides higher quality recording rates, good compression size (30 percent less than MPEG-4) and good wireless transmission.