SpikeLog-64 is a 64 channel single-board neural logger that also features ultrasonic audio and motion sensor logging. At a size of just 20 x 29mm and a weight of only 3.3g (not including battery), this board is a perfect, lightweight solution for recording neural signals in small animals such as rats and marmosets, among others. It’s on-board microphone is capable of recording animal calls up to 80kHz, and its 9-axis motion sensor records accelerometer, gyroscope and magnetometer data. For specifications see here.