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0 sats \ 0 replies \ @Celeste 21 Jun \ parent \ on: Nerd alert: ecash via sound? bitcoin
Would a FM Transmitter work? The devices speak through telepathy.
Specification:
Frequency range: 87.5-108MHz / Step
Effective Range: 5m
Voltage: 5V
Distortion degree: 2 percent
Color: Black
https://ae01.alicdn.com/kf/HTB1X_rPXMZupeRjt_jqq6AfAFXaI/LCD-3-5mm-Music-Audio-FM-Transmitter-Mini-Wireless-In-car-Transmitter-car-mp3-Transmitter-For.jpg_.webp