Compact and intuitive product use. It is what I expected. Unpacking the receiver is turned on without a problem. It has not been the same for the transmitter. After examination, the failure turned out to be a defective weld the battery door on the PCB. Thus, there is a flaw in the quality control of the finished product from the manufacturer. After reordering, (I did not want to return the product to that) the operation is perfect.