A:Answer The LenovoS345-14 Chromebook model number 81WX0000UX, ships with these ports: 2x USB 3.1 Gen 1, 1x headphone / microphone combo jack (3.5mm), 1x microSD card reader, 1x USB-C 3.1 Gen 1 (support data transfer, Power Delivery and DisplayPort), 1x USB-C 3.1 Gen 1 (support data transfer and Power Delivery). You can use any external mouse that is compatible with the Chrome Operating System. The S345-14 Chromebook does ship with a built in touchpad that functions as an external mouse would.