Power Solor LCD Keychain Size:45X25X7mm No batteries Flash all the time in rooms or under outdoor lights . Water-resistant or No Water resistant feature at one's option. Material: transparent plastic case + Solar battery + LCD screen + PC board It is good for Promotion. We can print your logo in the Keychain Flash:Single and double at one options(single flash) Change or no change photo by user at one's option OEM and ODM are welcome Trickle glue art