Features a real working digital clock and stopwatch on a circuit board design! Announcing the new FlashTek Flashing T-Shirts! These ultra cool FlashTek T-Shirts will ensure you stand out at your next party, function, disco or rave! There`s a funky design for every occasion! The new FlashTek T-Shirts are operated via 4 x AAA batteries (included). Batteries will last for approximately 12 hours and can be replaced. Each FlashTek Flashing T-Shirt has a small hidden pocket inside where the battery compartment is located. The battery pack contains a small on/off button as well as buttons to set the time or change the display to a stopwatch (which looks really cool ticking up in 1/10 seconds!) T-shirt Sizing Guide All FlashTek Flashing T-Shirts are made from cotton. Black colour only. Small 20` (50.5cm across) 28.5` (72.5cm length) Medium 21` (53cm across) 29` (74.5cm length) Large 22` (55.5cm across) 30` (76.5cm length) X-Large 23` (57.75cm across) 31` (78.5cm length) ** Sizes are approximate only. ** FlashTek T-Shirts CANNOT be returned! Choose your size wisely! Care - Avoid creasing the light panel when putting on or taking off. - Avoid forcing and stretching the wire system. - Avoid getting wet while the system is on or with batteries. Wash - Unplug the control box (battery box) - Hand wash only! Make sure not to crease the lighting panel and the wire system. - Re-plug in after the system is completely dried. A hair dryer may be used to further ensure that everything is dry and ready for use. - Enjoy the Flash! ** FlashTek T-Shirts CANNOT be returned! Choose your size wisely! View our range of Flashing T-Shirts