Explaining the “USB 3.1 Gen 1” port in the Retina MacBook | Ars Technica
Apple MacBook Pro with Retina Display (13-inch, 2015) review: Apple's 2015 MacBook Pro is still around for those who want fewer dongles - CNET
could it handle USB 3.1 - Apple Community
Identify the ports on your Mac
Apple Stops Selling 2015 MacBook Pro, Lineup Now Limited to Thunderbolt 3 Models [Updated] - MacRumors
Apple no longer sells the 2015 MacBook Pro - The Verge
MacBook Pro (Retina, 15-inch, Mid 2015) - Technical Specifications
Identify the ports on your Mac - Apple Support
Apple Macbook Pro 15.4" i7 Retina Display Mid 2015 Refurbished - Sunray Systems
Amazon.com: 【Updated Version】 Wakeach 85W Wall Charger for MacBook Pro 15 inch Retina (Made Mid 2012-Mid 2015),Replacement for Magnetic 2 Power Adapter mbp A1398 A1424 Portable Travel Power Supply : Electronics