Sennheiser EW 100 G4-835-SA

Microphone Type: Dynamic handheld
Frequency Response: 40 Hz – 16 kHz
Transmission Range: Up to 100 meters (328 feet)
Modulation: True diversity
Carrier Frequency Range: 516 – 558 MHz
Sensitivity: 1.8 mV/Pa
Receiver Type: Rack-mountable, half-rack size
Power Supply: AA batteries or rechargeable battery pack
Operating Time: Approx. 8 hours with AA batteries
Audio Output: Balanced XLR and unbalanced 1/4″ TRS
Controls: Volume, frequency selection, mute