Description from Thomann :
Rumberger TA3000 X- M. Descant and SBS- 2 bass microphone system for 96 bass- accordion. Elegant metal housing, power-on/off (mute) button, extremely low power consumption, ready for wireless operation, simplest usage uniform sound pickup, absolutely overload-proof, integrated filters (EQ’ s) for optimal sound, three separately adjustable, input for optional vocal microphone, signals (treble, bass, vocals), extremely low transmission of structure-borne sound,two-channel, configurable, output,battery status indicator. Powered by battery: 1,5 V Alkali AAA, Operating time: approx. 20-25 h. Polar pattern- descant: Cardioid, Polar pattern- bass: Sphere, Transmission range: 50 – 20.000 Hz, Output impedance: 600 Ohms, Output level: max. 0 dBu, Weight: 215 g, Length: TA3000X-S: 37,1 cm, Number of microphone capsules: TA3000X-M: 5. The "30-days Money-Back" guarantee (extended returns policy) for this special order is void.