T-Shirt lights up and functions as an actual working digital clock via a clever and discreet battery pack. Small-size adult T-shirt.

This T-shirt is an actual digital clock. Thanks to its battery pack, it lights up and shows you the time. Adult Extra Large size.

Official T-Shirt for the blockbuster Transformers movie. Lights up and has the "Bumblebee" name across the front. Adult small size.

Medium Adult Size version of the official "Transformers" movie T-shirt with the Bumblebee slogan.

Large adult size version of the Transformers movie's official T-Shirt. This one features Bumblebee's name across the front.

If you're a fan of the so-called "Evil" Decepticons rather than the wishy-washy (supposedly) heroic Autobots then you're going to love this Light-Up T-Shirt. Adult Small size.

Medium Adult sized version of the light-up Decepticon T-Shirt. Includes the purple Decepticon logo on the front.

Large-size version of the official Transformers movie Decepticon T-shirt with a lit-up front panel.

Kids'-sized version of the light-up Decepticon T-shirt produced to celebrate the official Transformers movie from Michael Bay.

Fits approx. 7-8 years old, but please confirm sizes- this one is designed for a 25-inch chest.

Decepticon T-Shirt with light-up panel. Size is designed for kids' aged around 9-10 years, but please double-check sizes as this is designed for a 27" chest.

The T-Qualizer T-Shirt goes retro with this 1960s/1970s-styled variant that is still sound-responsive, but so groovy man!

Adult Extra Large sized version of the T-Qualizer "Groove" sound-sensitive T-Shirt with varying patterns and dancing girl.

The Original and Best? That's up to you to judge, but this version of the T-Qualizer T-shirt is certainly stylish and sound-responsive. (It actually moves in time with the beat!)

Similar to the original T-Qualizer, but with a slightly different design and colours, it still has the light-up, sound-responsive panel.

Medium Adult-sized version of the T-Qualizer II T-Shirt, complete with sound-responsive light panel that moves in time with the beat.

Large Adult (41-43" chest) size version of the "3D" T-Qualizer II T-Shirt. Moves in time with the beat or any loud noise.