Specifications: Product name: EL luminous glasses Switch form: push button switch Product material: PC mirror frame, light cord PVC Voltage: DC3V Function: always on-slow flash-fast flash Power supply: 2 AAA batteries Connected Wire Lengh: 3.3 inch Packing include: 1 x EL Wire Glasses 1 x Battery Pack (battery not included) Attentions: Do not pull the cable between the glasses and the battery pack hard and frequently or it may fall off the glasses. Be sure to use the pack fixed, rather than free hanging, and the cable is not stretched tight. Premium Quality: Our eL wire glass is made from high quality plastic and PVC.which is no dazzling, no UV and no radiation.No heat. it is portable, durable and lightweight. you can take it out with you convenient,the high-quality EL wire present perfect visual effect and longer continuous glow time at night, and the lights has no impact on vision at all. Easy to use: Single button design. Press the button on the battery pack to change the EL glasses to light in any one of four modes: steady glow / blinking / FLASHING / off. Safe and secure: Ergonomic design and comfortable to wear. Perfect accessories for males and females, both young, teen and old. Easy to see out of, and the lights has no impact on vision at all. Long Working Time: Requires 2 AA batteries(not included),it can provide the adequate power to ensure a longer continuous light up time (two hours at least depending on your battary capacity used). the wire between the battery case and glasses are is 3.3ft, so the inverter can be put into pocket or clipped in belt. Perfect Party Supplies: They are great for neon glow party, glow party, night club, festival, Halloween, Thanksgiving, Christmas, outdoor concerts, bar, Birthdays, camping and raves and as gifts for your family or friends.