Easy to install. Bright LED, power saving, long service life. Great for parties, weddings, birthdays, anniversaries, Christmas, Halloween, decoration, and so on. Powered by 3 AG3 batteries (included). With a hook at the bottom, you can thread or hang them. 3 batteries in each led - replaceable, loop for hanging, on/off switch: twist bottom Size: 0.5"W x 1.25"L; Color: white - non blinking; Batteries: 3 x 1.5V LR41 in each led, 8 hours INCLUDED : 24x Balloons Lights