Samson Concert 77 CR77 Wireless Receiver (Only) - Channel N3-644.125 MHz Samson Concert/Airline 77 receiver only XLR and unbalanced 1/4-inch outputs with mic/line level output switch CR77 receiver features multi-segment audio level and RF level LED meters, squelch and volume control AC adapter and 1/4-inch to 1/4-inch cable included True diversity UHF wireless headset system with PLL frequency control