The AKG CSX CU50 flight-case charger can store and charge up to 50 CSx IRR10 infrared receivers. Connected to AC power (100-240 volts) intelligent charging cycles will keep the rechargeable NiMH batteries in optimum status. Sliding in the receivers into their slots will start charging automatically. The receivers – under charging process – show the “EEG” sign on the OLED display and at the end of the process the fully charged units show the OK sign: Normal charging time is approx. 6 hours.