‎1 9V batteries required.

Lenovo ThinkPad X1 Nano Gen1 20UN000EUS 13″ Ultrabook – Intel Core i7 i7-1160G7 Quad-core (4 Core) 2.10 GHz – 16 GB RAM – 512 GB SSD – Black – Windows 10 Pro – Intel Iris Xe Graphics – in-Plane S