Cheetah battery operated led plastic strobe with speed control and on/off button. Made from robust plastic with hanging bracket. Not suitable for people with photo sensitive epilepsy. Uses 4 aa batteries (not supplied).battery operated, batteries 2 x aa, not suppliedspeed controlno lamp change requireddimensions mm, 135x85x50weight 0.5kgflash rate 1-6 flashes per secondbuilt-in speed controlbulb type