OneBeep

OneBeep has developed an inexpensive and robust method to send digital content to these devices. Using OneBeep's software any digital file can be converted to audio, which is then sent via radio waves. This can be received on any AM/FM radio, which passes it on to the laptop via an inexpensive audio cable. The file is then converted back to its original form once it has been received on the devices. As every village has AM radios, you now have a low-cost way to beam out daily lessons, health material etc over long distances to thousands of devices.