Our newest USB-powered beacon makes battery life a non-issue. In addition, because there is no battery to worry about, you can speed up the broadcast interval to 100ms to make it easier for phone ...

But if you run out of battery on a long flight, worry not: You can plug the Relay into seat outlets with a USB cord ... I am still surprised that some airplanes do not have screens with Bluetooth ...

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Notes about the architecture and usage of the relay.