It’s important to stress that this is a research project and we don’t currently aim to sell/provide ready made devices. We provide the schematics and designs for the basic electronics. How these are housed is up to the individual researcher. We have experience of deploying the devices on seabirds using heat-shrink tubing which is very compact and lightweight and suitable for short-term deployments that we would be happy to discuss. We also have facilities at UCL and Microsoft Research to explore fabrication of custom housings with colleagues/collaborators.