Denon DAT-Portables are compact digital audio tape recorders designed for high-quality audio recording and playback. They leverage the Digital Audio Tape (DAT) technology, which allows for the recording of PCM audio at varying sampling rates such as 32kHz, 44.1kHz, or 48kHz. Typically, these units are equipped with features like digital inputs and outputs, allowing for seamless connectivity with other audio devices. They often include built-in microphones, providing users with the flexibility to record audio on the go. Additionally, many models feature battery operation, making them suitable for field recordings. The units might also come with display screens for easy navigation of recorded tracks. Specifications may vary by model, but features can include a variety of transport controls (record, pause, rewind, fast forward), input/output connections (including AES/EBU, S/PDIF), and possibly firewire for high-speed data transfer.