WALTR 2 requires a computer with:
macOS: Mavericks 10.9 & higher
Windows: 7 or higher
Devices that WALTR 2 recognizes:
iPad & iPhone: all devices running on iOS 5 & higher, iPadOS
iPod: every non-iOS iPod (Nano, Shuffle, Mini, Classic) + iPod touch (iOS 5 + above)