Features: -100% brand new and high quality. -Can be used on both indoor and outdoor night shows and activities. -A fine last minute costume prop. -Portable and easy to wear. -Use single button to control four modes: constant light up, slow flashing and fast blinking and shut off. -No heat generated. -Battery pack and eyeglasses separated design giving you a long time enjoying experience. - accessories for males and females, both young, teen and old. Specifications: Material of frame: plastic material of glasses: AC connected wire Length: 47 inch Battery pack size: 9. 1 x 3. 3 x 2cm (3. 6 x 1. 3 x 0. 8 inch) Battery type: 2 x 1. 5V AA dry batteries (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. Warm tips: sometime you would hear a slight buzzing noise from the battery pack when powered on. It is normal phenomenon. El Wire glow needs a high frequency pulsed power source which frequency falls squarely at the frequencies that are more sensitive to hearing. But it is a weak sound and is easy for most people to accept, especially when you hide The pack at your waist or in the pocket. Packing include: 1 x El Wire glasses 1 x battery pack (battery not included)