Features:

1.With clip: easy for carring (in the pocket, on the book and note book)

2. With rubber touch scree pen head; convenient for using Ipad, phone, etc with touch screens.

3. With 2 led: convenient for writing in dark

4. Stylus ballpoint: easy for changing and for writing 

Advantages:

Ideal For
Great for emergency use or anywhere extra light is needed
Great for writing when you are in a meeting or on a plane
Great for touching screen when you are using the phone or the ipad.
Great for office worker
Great for who always on business trips