This is a photo of the new Oyster device from Digital Matter.
It is a ‘mini-Remora’ and comes in at roughly 40% the size of the Remora.
It is IP67 rated (can go half a metre underwater!) – and that adds to the complexity of the housing design (more on this in another blog post later).
It takes 3 x AA batteries, either normal alkaline or the ‘off the shelf’ Lithium AA batteries that you can now buy at your local supermarket.