Purchasing notice Due to the restrictions of shipping routes, we can only send one battery (except for the Russian Cainiao Heavy Package e) Detail 1. It is made of PC material, light and flexible, which makes it comfortable for users to wear 2. Using the world’s top medical grade LED light source, color temperature 5000k. 3. Double lamp design, the Angle of irradiation and eye are synchronization, no difference in Angle of view. 4. Wireless , Lithium battery power and the charger has the protection over-charging so it can extend the battery life. Note: Only one battery is included