<https://handmadeelectronicinstruments.com/product/sync-cable/#product>
<http://schema.org/description>
"This is the cable used to sync any of the devices with clock in/out, or to send control voltages between devices. It is a 1/8\"(3.5mm) mono male to male cable. At two feet in length it is perfect for connecting devices together without too much access cable.\r\n\r\nNo extra charge for shipping with a device.\r\n\r\nShips on next day."
<https://handmadeelectronicinstruments.com/product/sync-cable/>