Sanyo Security Products makes security recording and playback easier and more affordable for small retail establishments with the hard drive recorder, DSR-3506. The unit is ideal for security installations in convenience stores, fast-food outlets, gas stations and other small businesses. The unit features a built-in six-channel duplex multiplexer for recording and viewing up to six color or monochrome cameras. Simultaneous real-time live display of all six channels can be accomplished with the DSR-3506. The storage capacity of the unit is expandable depending on the storage requirements. The DSR-3506 has two bays that are capable of 300 per bay, for a total of 600 GB. Sanyo Security Products

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