Simply attach to the LED light to the ceiling of your bivvy using the supplied magnet or suspension clip. 360 lighting with 23 + 3 LEDs 360 lighting with 23 LEDs Central lighting with 3 LEDs Soft touch coating Remote control range up to 20m. Up to 30 hours battery life with 3 LEDs and 5 hours with 23 LEDs. Requires 4x AA batteries (not supplied)