[Commodity material]: ABS engineering plastic [Commodity color]: black [Commodity power supply]: AA battery x5 (Not included, you need to buy it yourself) [Specification and size]: Base diameter: 12cm Helicopter blade diameter: 14cm Flying helicopter propeller design, digital time display, LED screen for easy reading Propeller rotates quickly when the alarm sounds. Can fly through the room The start with a special switch can be manually operated to play free flight, and can be freely set to adjust the time and date LCD display with alarm clock, snooze, blue backlight The alarm clock can only be switched off with the propeller in the machine Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-dadangjia