> For the complete documentation index, see [llms.txt](https://avss.gitbook.io/prs-m4ex-for-dji-m4e-and-m4t-easa-c5/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://avss.gitbook.io/prs-m4ex-for-dji-m4e-and-m4t-easa-c5/prs-m4ex-for-dji-m4e-and-m4t/installation.md).

# Installation

{% hint style="danger" %}
ENSURE THAT THE PRS-M4EX IS TURNED OFF BEFORE ATTACHING AND/OR DISCONNECTING THE PRS-M4EX FROM THE DRONE.
{% endhint %}

## First Time Setup

<table data-header-hidden data-full-width="false"><thead><tr><th width="107"></th><th width="121"></th><th width="202"></th><th></th></tr></thead><tbody><tr><td>Step 1</td><td>Locate the Forward Gasket Door on the Drone</td><td>For the PRS-M4EX to be properly installed on the Drone, the forward gasket door needs to be opened on the drone.</td><td><div><figure><img src="/files/Irj4EZ8OE11c5zn9tIUH" alt=""><figcaption></figcaption></figure></div></td></tr></tbody></table>

## Attaching the PRS-M4EX to the Drone

<table data-header-hidden data-full-width="false"><thead><tr><th width="103"></th><th width="121"></th><th width="200"></th><th></th></tr></thead><tbody><tr><td>Step 1</td><td>Attach Mounting Bracket Around Body of Drone</td><td>Carefully slide the PRS-M4EX mounting bracket backward over the Drone's frame until the front of the bracket is flush with the drone.</td><td><div><figure><img src="/files/FkNuRSbYHQzMGCpA8qkP" alt=""><figcaption></figcaption></figure></div></td></tr><tr><td>Step 2</td><td>Push PRS USB Connector Into Forward USB Port</td><td>Place the PRS on top of the mounting bracket and apply gentle downward pressure to the PRS-M4EX to lower the attached USB connector onto the USB port.</td><td><div><figure><img src="/files/N7Xrov4rGOuvboFTEQdC" alt=""><figcaption></figcaption></figure></div></td></tr><tr><td>Step 3</td><td>Install Mounting Screws to the Drone</td><td>The PRS-M4EX includes M3 x 12 mm screws (QTY 4) to secure the PRS-M4EX to the Drone. Insert these screws into the mounting holes shown at right and tighten until the PRS is securely fastened. Tighten the back screws before tightening the front screws on the mounting bracket.</td><td><div><figure><img src="/files/BI2eKPSbbZ83kZB0ZeZ2" alt=""><figcaption></figcaption></figure></div><div><figure><img src="/files/VNIuKMMImLfgamlvbkW0" alt=""><figcaption></figcaption></figure></div></td></tr><tr><td>Step 4</td><td>Power On Drone/PRS</td><td>To turn on the PRS-M4EX, you will need to turn on the Drone. </td><td><div><figure><img src="/files/eQiAUUHg9obmAVkWcS85" alt=""><figcaption></figcaption></figure></div></td></tr><tr><td>Step 5</td><td>Check System Status</td><td>Check for the PRS system status on the Drone transmitter. This will be indicated by the PSDK symbol on the right-hand side of the transmitter's screen when in the camera view.</td><td>                            <img src="/files/ruZ3AJ67qgdxyRcl6jdW" alt="" data-size="original"></td></tr><tr><td>Step 6</td><td>Power Off Drone/PRS</td><td>Power off the Drone. The PRS-M4EX will take up to five (5) seconds for the LED to turn off, once the LED is off the PRS is safe to approach. Do not unplug or move the Drone or PRS-M4EX until the PRS-M4EX is turned off.</td><td><div><figure><img src="/files/TNcey74Hs4qGecQjRM02" alt=""><figcaption></figcaption></figure></div></td></tr></tbody></table>