Does it have build in Wi-Fi?

No, it does not have built-in Wi-Fi.

Questions & Answers: Refurbished: Lenovo ThinkCentre M93p, Tower, Intel Core i7-4790 @ 3.60 GHz, 16GB DDR3, 1TB HDD, DVD-RW, Microsoft Windows 10 Pro 64-bit

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Lenovo ThinkCentre M93p, Tower, Intel Core i7-4790 @ 3.60 GHz, 16GB DDR3, 1TB HDD, DVD-RW, Microsoft Windows 10 Pro 64-bit