This is the Electric Powered, 2.4GHz Radio Controlled, Ready to Fly Estes Proto-X Nano Quadcopter. For Ages 14 and Above. For Indoor Use Only. Now Available in Six Body Colors; Green, ESTE48GG Red, ESTE48RR Black, ESTE48LL White, ESTE48WW Purple, ESTE48PP Yellow, ESTE48YY Extra propellers are available ESTE4615 Extra batteries are available ESTE4618 FEATURES: Plastic body with window and trim detail LED light indicates front and back of the heli, and also helps in low light flying 4-channel 2.4GHz Radio with digital trims Six axis gyro with an "Auto Upright System" that self-corrects the quadcopter regardless of the direction that it's launched Four micro motors 100mAh 3.7V LiPo battery USB charge cord One-piece PCB frame INCLUDES: RTF Proto-X Nano Quadcopter, 2.4GHz Radio, LiPo Battery, USB Charge Cord, 4 spare rotor blades, and Instructions REQUIRES: AAA Batteries: Two for transmitter SPECS: Dimensions: 1.8 x 1.8" (45 x 45mm) Weight: 0.40oz (11.5g) COMMENTS: For additional information or support for this item, please use these resources - Email: email@example.com Web Site: http://www.hobbico.com/ Phone: 217-398-8970 Due to its very small size, the Proto-X has a built-in LiPo battery that is not designed for replacement. Attempting to remove or replace the Lipo battery will likely damage the quadcopter. In addition, precise placement of the battery is critical for proper CG, balance and performance and isn't recommended for consumer replacement.