Sennheiser SKP 100 G4-A, Plug-In Transmitter, Frequency range: A-band (516 - 558 MHz), Turns dynamic wired microphones into wireless microphones, RF output power: Max. 30 mW, Operating time: Up to 8 hours, Range: Up to 100 metres, Power supply: 2 AA batteries (1.5 V) or battery pack BA 2015 (not included), Dimensions: approx. 105 x 43 x 43 mm, Weight: approx. 95g@+*Note:* Device does not provide phantom power. Operation with condenser microphones is not possible.@+@+