I bought only the body without the transmitter of H501S. The transmitter uses the H502S that I already have. I’m opening the package as it arrived. This box contains only the H501S body and propellers at the raised bottom. Battery and chargers are not included. This is all that was in the box. I bought batteries and charging cable by Amazon. Next, update firmware. First open the Hubsan homepage and press the H501S Latest firmware at the bottom of the SUPPORT page. Extract the downloaded file and read the document. Then upgrade the flight controller and receiver on H501S body. The first time I get an error, ignore it and press it again. Next upgrade the firmware on the transmitter. Before and after firmware change.