Multimeter

Measurement range 30dB ~ 130dB 
Accuracy  ±2dB
Resolution  0.1dB
Display  3 1/2 digitals
Sample rate  2 times/s
Frequency range  30Hz ~ 8kHz
Over range indication  “UNDER” or “OVER”
Low power indication 
Auxilitary output AC 0.707Vrms at full range for each level,
impedance 600Ω
DC 10mV/dB, impedance 100Ω
Battary voltage 6 x 1.5V (AAA)