4. There’s two electrical plug ins on the chair. One is the power cord directly in the back, power cord is about four feet long–I was actually surprised by how short it was, you can always get an extension though (or just order a longer one), it’s a nonproprietery universal AWG power plug.
https://www.amazon.com/Massage-Recliner-Stretching-Bluetooth-Vibrator/dp/B07ZCLX88B