To activate light twist bottom
Bright LED, power saving, long service life.
Great for parties, weddings, birthdays, anniversaries, Christmas, Halloween, decoration, and so on.
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 1.4"L; Color: white - non blinking; 
Batteries: 3 x 1.5V LR41 in each led, 8 hours(included)
Function:waterproofed

Weight: 4 grams/one piece
12 pcs/ set 3 sets/inner pack 192 sets/ master carton