Sennheiser SKM9000 Wireless Mic

Dimensions : Length: 270 mm; Diameter: 40 mm.
Power consumption :Max. 960 mW.
Operating time : 5.5 h with rechargeable battery BA 60.
Frequency response : 80 - 20000 Hz (3 dB)
RF Output Power : Mode HD: 10 mW rms, 50 mW peak, Mode LR: 25 mW rms, 50 mW peak.
Modulation : Mode HD: uncompressed audio Mode LR: SeDAC (Sennheiser Digital Audio Codec)
Weight approx. 350 g (with rechargeable battery pack BA 60 and microphone head ME 9005)
Switching bandwidth 88 MHz
Frequency range : 
SKM 9000 A1-A4: 470-558 MHz
SKM 9000 A5-A8: 550-638 MHz
SKM 9000 B1-B4: 630-718 MHz
SKM 9000 B5-B8: 710-798 MHz