A:AnswerHi Gigi, The M170 won't work with the Unifying Receiver. It uses the Nano Receiver (P/N: 993-001106). Hope this helped and finds you well. - Richard from Logitech
A:AnswerThe included USB receiver does fit inside the mouse, under the battery door. You'll find the USB receiver here when you first open the packaging. It uses a single AA-battery.
