The AR2 is the receiver from the Samson Airline Micro systems (Earset and Camera). This E4 version operates on UHF frequency 864.875 MHz.
The AKG SR45 is a wireless receiver, fit for the wireless handhelds and bodypacks from the Perception series. The receiver has a range of 30 metres and is equipped with internal antennas.
The Samson AR2 receiver operates in combination with an AL2 or AH2 transmitter from the AirLine Micro systems, and communicates via frequency E2 (863.625 MHz).
The Samson AR2 is the receiver from the Micro Camera and Micro Earset wireless systems. Use it with the AH2 or AL2 transmitter, which operates on frequency E1 (863.125 MHz).
This wireless receiver, the QLXD4 (S50), operates within the 823-832 & 863-865 MHz frequency bands. Use in Germany.
The ER-1193B is a wireless receiver by DAP, for use with the EM-193B and EB-193B handheld and beltpack. This receiver is of the true diversity type, operates on UHF and measures half a rack width.