The A681 is a digital TV tuner dongle that receives over-the-air ATSC and cable signals between 54-862 MHz for viewing live and recording television on a computer. It supports multiple video and audio formats, has an electronic program guide, allows rewinding and fast forwarding of live TV, and can schedule recordings to save on the computer's hard drive. The dongle comes with an antenna, remote control, software, and documentation to set up digital TV viewing and recording on Windows, Linux, and Android operating systems.