Easy to use: Just need to install 2 AA batteries (not included) with one-touch operation and four modes: steady on/flashing/blinking/off. The package and the glasses are connected by a 35" wire. Stylish and Attractive: Makes you the star of the party! Great for parties, shows, rave concerts, and festivals. Stylish: EL wire provides excellent visual effect and longer continuous light duration at night. Stylish sunglasses frames convey style. Comfortable to Wear: Perfect accessories for men and women, youth, teens, and seniors. Easy to see and the light does not affect vision. Long Lasting: Enough power to ensure longer continuous light duration (at least two hours, depending on battery capacity). Product Description: - Frame Material: Plastic - Glasses Material: AC - Wire Length: 35 inches - Battery Size: 9.1 x 3.3 x 2 cm (3.6 x 1.3 x 0.8 inches) - Battery Type: 2 x 1.5V AA batteries (not included) Main Function: - Can be used for both indoor performances as well as for indoor and outdoor activities. - Stylish sunglasses frames with clear lenses. - Portable and easy to carry. - Use a single button to control four modes: steady light, slow flashing, fast flashing, and off. - No heat generation. - Separate design of the battery and the glasses, ensuring a long experience. Package includes: - EL wire glasses * 1 - 2AA battery pack controller (battery not included) * 1 Attention: Do not pull the wire hard and frequently between the glasses and the battery, otherwise it may come loose from the glasses. Do not use the pack hard, use it hard and the wire is not tight. Useful tips: You may sometimes hear a slight buzzing noise from the battery when you turn it on. This is normal. Annealing EL wires requires a high-frequency pulsed power supply, the frequency of which exactly matches the most sensitive frequencies to the ear. However, it is a faint sound that is easy for most people to accept, especially if the pack is worn on their waist or in a pocket.