It is a new idear for Alarm Clock. Once the time you set is up， the helicopter will be revolved a lot then fly away from the clock base， while the alarm is ringing. You have to get up and find the missing helicopter， then put it back on the base to stop the clock ringing， or it will not stop making noise. Otherwise， it is also can be a toy for children. Just put the helicoptor on the base， and press the "FLY" key for a short while then release it， the helicopter will fly up in front of you， fantastic! Power: 5 AA batteries(not included) Color: black Size: 108*142*142mm Weight: 186g Package size: 174*170*85 Package weight: 328g Package included: 1* Flying Style Digital Alarm Clock