Additional Monitors

Actually, no, it only supports the use of 1 external monitor. It supports one external 4k monitor and it won’t support Thunderbolt or DisplayPort monitors. You can use 1 external monitor with a HDMI connection.

Yup, ChicagoLCSW, your MacBook (retina 12-inch Early 2015) does support 2 additional monitors, up to 4k k @ 24 hz, with either Thunderbolt 2 or MiniDisplayPort support... it also has one HDMI port.... I don't know if it's a good idea to try to run 3 monitors from it, but two should be OK. As for display adapter, well, MiniDisplayPort should be fine, with HDMI, DVI, VGA, dual-link DVI supported with the appropriate display adapters (which in the case of DVI, should be active ones, and not passive)

hope this helps you a bit

john B