Glow-in-the-Dark Wall Clock

Why?

Because for $4.99 it's got an awful lot going on.

From the website:

Glow-In-The-Dark Wall Clock

Tell time at a glance — 24 hours a day — with this sleek, glow-in-the-dark wall clock.

Features a precision quartz movement and large, easy-to-read numbers that glow in the dark unlike many clocks.

Perfect for any room in your home or office.

Uses one AA battery (not included).

7-1/2" diameter.