SpikeLog-128 is a single-board 128 channel logger that includes a 9-axis motion sensor. It is only 30 x 30mm and weighs just 4.4g, making it suitable for recording neural signals in animals as small as rats or marmosets. The neural inputs are connected via a pair of 70-pin molex connectors. In general, it will connect to the electrode assembly via an adaptor board. For specifications see here.