> For the complete documentation index, see [llms.txt](https://docs.verifone.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.verifone.com/hardware-products/hardware/engage-devices/ux1-3-4xx-series/ux4xx/ux400-installation-guide/specifications.md).

# Specifications

This chapter discusses power requirements, dimensions and other specifications of the contactless reader.

## Power Consumption

* Power consumption mode: 450 mW, maximum
* Card read mode
* Idle mode
* Sleep mode: 0.3 W

## Temperature

* Operating temperature: -20 °C – 70 °C (-4 °F – 158 °F)
* Storage temperature: -25 °C – 70 °C (-13 °F – 158 °F)
* Relative humidity: 5% to 90% RH non-condensing

{% hint style="info" %}
If this device is to be used in the Nordic countries, or in any environment where the temperature range exceeds the product's operating temperature, it is the responsibility of the integrators to ensure that the ambient environment is controlled in such a way to ensure that the product operates within the specified temperature range.
{% endhint %}

## External Dimensions

* Length: 96 mm (3.78 in)
* Width: 99 mm (3.9 in)
* Depth: 46 mm (1.81 in)

## Weight

* Unit weight: 142 g (5 oz)

## CTLS Card Reader

* Four LEDs for CTLS indications

## Peripheral Ports

* RJ-45 host communication port
* SMA (RF) antenna

## Communication

* SPI
* I²C


---

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