The most convenient and safe setup to work with is using one Tentacle per recording device.
There are recording devices that don't have any specific inputs for timecode. These devices definitely need a Tentacle constantly connected to feed them with the necessary timecode information.
There are other recording devices that have options for inputting timecode. In this case please note that every timecode clock needs to be synchronized when being powered off and on again. Our Tentacles have built-in batteries that - under normal operating conditions - can last up to 35 hours. Once they are connected properly to the various recording devices they can constantly output the correct timecode information without switching them off in between. That is why we recommend this setup. There is no need to re-sync any device after a change of battery for example.
With one Tentacle per camera or sound recorder you only need to synchronize once a day. When the Tentacles are fully charged, setup and connected correctly to the recording devices you will have the most convenient and reliable timecode synchronicity for up to 24 hours in one go.