Makes sense. But I wish the show would've made it more clear. If Barry had tossed the device aside and Black Flash backed off, it would've been clear even without an explanation. Instead, Barry slammed the device into its chest and Black Flash exploded. This made it look like Barry defeated Black Flash outright with a tracking device and I was waiting for an explanation on how it was possible. I was expecting some pseudo-scientific explanation like whatever hyper-dimensional the device gave off not mixing well with whatever the Speedforce was using to control Black Flash or something like that. I was like, "Damn, in Legends Thawn was going through so much trouble to avoid Black Flash and all he really needed was one of Cisco's "Goldtooth" devices?"