Concept Designs for Personal Panic Alarm Housing

I’d like someone to develop a number of concept designs (3D CAD) for a 2/4G personal panic/SOS alarm.

The device is intended to be used on construction sites and must be developed with this in mind.

It will have the following features:

– Rugged waterproof case (IP65 or higher)
– a small OLED screen
– siren/sounder
– LEDs to provide warning to user if they cannot hear alarm
– on/off button
– 2-3 other small buttons (function TBC)
– Charge port

It is expected to be the size of a 2-way radio and therefore handheld.

It is intended that one of these designs will then be developed into a manufacturing/moulding design afterwards as a separate project. Expertise in both concept and manufacturing design is required and you will need to provide examples of previous work