Mobile learning has several key characteristics:
1. It is portable as learning resources can be accessed anytime, anywhere through mobile devices.
2. It utilizes wireless networking which avoids problems with internet connectivity and allows for flexible learning.
3. It is interactive as learners can interact with instructors, course materials, and each other through mobile applications and tools like texting, mobile internet, and voice calls.
4. Learners can access a variety of materials from anywhere at any time which provides multiple opportunities for comprehension and retention.