Sennheiser SL MCR 4 DW-3

Frequency Range: 1.9 GHz (Digital Wireless)
Channels: 3
Audio Output: Balanced XLR
Connectivity: Antenna Diversity
Power Supply: 100-240V AC, 50/60Hz
Operating Temperature: 0?C to +40?C
Signal-to-Noise Ratio: > 110 dBA
Encryption: AES 256-bit
Mounting: Rack-mountable with included hardware
Display: OLED for channel and status information