From the product description:
The Micro Mosquito 3.0 Channel R/C Helicopter is the world's smallest, most stable, lightest indoor helicopter. Flies forward with full control as well as up, down, left and right and has a long 7-minute in-flight time on only a 35-minute charge. Two frequencies available. Comes with everything you need to be flying within minutes including a radio control transmitter, flight battery and manual. Requires 6 "C" batteries and one 9V battery, not included. Measures approximately 5".
Here Amazon's page for the Micro Mosquito 3.0 Channel R/C Helicopter