• GPS modules, chip sets and antennae.
• High quality audio playback, MP3, ADPCM, class D amps.
• Electronic compasses, AMR sensors, IGRF compensation.
• Standard and full custom LCD panels to 1/4 VGA, 16 level greyscale.
• Battery and charger technology.
• Injection moulding, production and tooling.

Hardware / software partitioning

• Determine the most effective split between hardware and software functionality, minimise cost but maximise battery life.

Schematics & PCB layout

• Create initial schematics and PCB placement - determine size & weight.

Power consumption

• Model battery life under all expected usage scenarios.

Cost models

• Identify all costs involved in development and production.

Design specification

• Justify the design recommendations and write a design specification for future development.

User interface simulation

• "Demonstrate" the product, how will it look and feel ?