EZpass and the new Epass Extra are 2 different things. There is no EZpass Extra. EZpass and Epass. Epass Extra will work in 18 eastern states including the OP's state of PA. Epass Extra will work in any EZpass state. Epass Extra works all over Florida. No need for Sunpass or anything else.
The Epass Extra is Velcro mounted for easy removal. You register Truck and trailer plates. You register MH and toad. You place the transponder in the toad if you wanna drive it.
If your hauling a motorcycle trailer and want to drive the motorcycle when you get someplace then you call and tell them you put in on the bike. In you pocket it fine. When you load the bike you take it off and call them back and tell the where it is.
Cost is $20.00 for the movable transponder. Free if you only have one vehicle and don't need to move it. You sign up for automatic $$ replenishment with a $10 min bal. No monthly service charges.
https://www.cfxway.com/e-pass-xtra/
Pay by Plate charges are much higher than Transponder payments. MA Pike has no toll booths. It either Pay by Plate or transponder.