Feature: Awesome and eyes-catching,stand out from the crowd with these LED earring Wear the sparkling crystal earrings during the day. Then turn the LED light on at night or when it's for time to have fun! To activate your Earrings, push the earring through your earlobe's pre-pierced hole and firmly attach the other half on back, light will turn on and stay on. Steady light function only. Perfect for outdoor activities, parties, night activities,concert and all kinds of night life fun Warmly Tips: 1 To activate your Light Earrings, push the earring through your earlobe's pre-pierced hole And firmly attach the other half on back, light will turn on and stay on. Changing color function. 2 To replace batteries, carefully unscrew the back of the battery housing. The batteries are very small, so keep a close eye on them. 3 Battery can last over 36 hours, Please keep away from water. Material: Stainless steel. Color: Red or Green or Pink or Yellow or Multi Color or White or Purple or Blue or Orange. Size: (Approx.) 21.4 for cm or 0.80.5". Quantity:1 PC, if want one pair,please make 2 orders,we will give u better price for one pair. Note: Size for manual measurement, there may be a 0 to 2 for cm error, belongs to the normal phenomenon. And due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 PC Earring.