KiloLight 9-LED Piano Light, with USB and AC Power Adapter 9 eco-friendly LEDs illuminate up to four pages of sheet music Easy access power switch controls two brightness levels Strong and flexible arm allows the light to be positioned in different angles as needed Powered by a USB / AC Power Adapter (included) or 3 AA batteries (not included), along with a 3 meter (9.5 feet) power cord (included) Size: about 44.5 x 21 cm / 17.5 x 8.2 inch (L x W ), 3 meter (9.5 feet) power cord