AKG CSX-CU50 Storage and Charging Case for 50 CSX IRR10 ReceiversThe CSX CU50 Storage and Charging Case form AKG is a flight case charger designed to hold 50 CSX IRR10 IR receivers while not in use. The case connects to an AC power outlet (100 240 VAC) intelligent charging cycles which keeps the rechargeable batteries in optimum status. Sliding the receivers into their slots will start charging automatically. When being charged, the receiver indicates the "EEG" sign on the OLED display. At the end of the process