Ethernet NTP digital wall clocks plug into an NTP times server using an Ethernet cable. This means that the time signal is sent from the NTP time server directly to the Ethernet NTP digital wall clock, maintaining its accuracy. The Ethernet digital wall clock never needs setting as it is automatically set by the time signal sent from the times server, which means it will always be accurate, and the Ethernet NTP digital wall clock requires no mains power or batteries as it gets its power form the Ethernet.
Because health care is based on multi-disciplinary teams, treatments, meetings, operations and procedures often require strict coordination to prevent wasting time and provide an efficient service. Making sure everybody has access to a synchronised and accurate time is part of this process, which is what makes precise and reliable digital wall clocks for hospitals so important.
A business digital wall clock can use an atomic clock as a source of time, and relay this time in a digital display. These atomic clock receiving clocks come in various guises. Some use small radio receivers to pick up the atomic clock transmissions broadcast by the National Physical Laboratory (NPL) in the UK or the National Institute of Standards and Time (NIST) in the USA