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# Model-Specific Information

This section explains how you can identify the model type and region of your machine.

This machine comes in two models which vary in what type of auto document feeder (ADF) they are equipped with: ADF (capable of 1 Side Scanning) or ARDF (capable of Auto Reverse Scanning).

When describing procedures that are model-specific, this manual refers to the different machine models as Type 1 or Type 2. The following table describes the model types.

Model types
Model type | Model name | Type of ADF
--- | --- | ---
Type 1 | SP 3500SF | ADF
Type 2 | SP 3510SF | ARDF

Furthermore, there is a label on the right side of the machine, located in the position shown below. The label contains details that identify the region your machine belongs to. Read the label.

The following information is region-specific. Read the information under the symbol that corresponds to the region of your machine.

(mainly Europe and Asia)

If the label contains the following, your machine is a region A model:

- CODE XXXX -22, -27

- 220-240V

(mainly North America)

If the label contains the following, your machine is a region B model:

- CODE XXXX -17

- 120 V

- Dimensions in this manual are given in two units of measure: metric and inch. If your machine is a Region A model, refer to the metric units. If your machine is a Region B model, refer to the inch units.