All current data loggers by Deuteron Technologies are animal-borne devices that record the neural or audio data, amplify and digitize the signals, and store the data in memory media on the animal. They are suitable for a range of animals including (but not limited to) mice, rats, fish, bats, marmosets, and macaque monkeys. All of the settings of a logger are controlled from a computer by radio link using our synchronizing transceivers described below. There are two types of data loggers for recording different types of data: neural and audio.