The mic has a 81 db signal to noise ratio range - according to the specs. Should work great for most home applications tho. What were you planning to use it for? It is sensitive and will require a wind screen for any close-up work. Nice acoustic suspension included. For what you got - and especially what you paid for it - I think you got a screamin deal.
Behringer B1 Vocal Condenser Microphone Specifications
•Transducer Type: Condenser, 1 inch single diaphragm
•Operating Principle: Pressure Gradient
•Polar Pattern: Cardioid
•Connection: Gold-plated balanced XLR connector
•Open Circuit Voltage at 1kHz: -34 +/-2 dBV (0 dBV = 1 V/Pa)
•Open Circuit Sensitivity: 20 mV/Pa
•Frequency Range: 20Hz - 20kHz
•Level Attenuation: -10dB (switchable)
•Low-Cut Filter: 6dB/Octave @ 75Hz (switchable)
•Maximum SPL (1% THD @ 1kHz): 138 dB (0dB), 148dB (-10dB)
•Equivalent SPL (IEC 268-4): 13dB-A
•Signal-to-Noise Ratio RE 1 Pa: 81dB A-weighted
•Nominal Impedance: 50 Ohms
•Load Impedance: > 1 kOhm
•Supply Voltage: +48V
•Supply Current: 3 mA
•Dimensions:
◦Diameter: 2.28 inches (58 mm)
◦Length: 6.85 inches (174 mm)
•Weight: 16.26 ounces (461 g)