What iPhone and iPad Models Will the AirPods Work With

According to Apple, the new AirPods will work with these iPhone, iPad, iPod, and Watch models:

iPhone Models

iPhone 5
iPhone 5c
iPhone 5s
iPhone SE
iPhone 6
iPhone 6 Plus
iPhone 6s
iPhone 6s Plus
iPhone 7
iPhone 7 Plus

iPad Models

iPad mini 2
iPad Air
iPad Air 2
iPad mini 3
iPad mini 4
iPad Pro (9.7-inch)
iPad Pro (12.9-inch)

iPod Models

iPod touch 6th Generation

Watch Models

38mm Case
42mm Case

Note that Apple AirPods require an active iCloud account and macOS Sierra, iOS 10, or watchOS 3 to be used. Therefore, the AirPods will work on previous iPhone models as well.

Source: Apple website