Spyke
vaionkoreply
sopuli.xyz

Yes. And automatically sets the time, but only in Japan unforyunately

3
aussie.zone

There's a phone app you can use to transmit the same signal from your phone speakers surprisingly enough

4

Yup I've used that. Unfortunately the battery in the watch is so bad that it won't stay running even if left on the windowsill so it never keeps the correct time.

1

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My little oddball | Spyke