For more specific protocol information you can check the technical documentation from the manufacturer: http://dev.byrobot.co.kr/documents/en/products/petrone/protocol/

CoDrone uses an Arduino based controller running on 5V that communicates with the drone using 2.4GHz Bluetooth Low Energy (BLE) with a range of about 20 meters. The drone operates with a single cell Lithium-Ion Polymer battery (3.7V and 300mAh).