Description: Brand: OMPHOBBYItem: T6 Product: Helicopter Transmitter Battery: 2* 18650 3.7V 2500mah Lipo Battery (built-in) Application: For OMPHOBBY M2 RC Helicopter There are 2 modes of the transmitter, Mode 1 (right hand throttle)/ Mode 2 (left hand throttle), with built-in 18650 Batteries, can be used continuously about 25hrs. It also support PRM Simulotor (3.5mm audio interface). Package:1* OMPHOBBY M2 RC Helicopter Transmitter