I have the following SPL meter that was given to me. I was wondering how it compared to the Radio Shack SPL meter and it being digital would it work okay with my AVIA DVD? There are 2 things that I question. The frequency response only measures down to 30hz, that won't be low enough, but I couldn't find the specs on the Radio Shack model so I don't know if it measures lower. The other is the accuracy, is +/-2dB acceptable? Any suggestions or advice is appreciated. Guy Kuo, I'd really like your response if possible. Thanks, SP 72-860 $149.00 Digital Sound Level Meter Features: A and C weighting 35~130dB measurement 2 ranges Meets IEC 651 type 2 standards 3 1/2 digit LCD display 1/2" condenser microphone Fast and slow dynamic response Over and under range indicator Maximum level hold Internal oscillator for calibration AC and DC signal output Includes owners manual, 9V battery, carrying case, wind screen and adjustment screwdriver Specifications: Range 35~90dB (low), 75~130dB (high) Resolution 0.1dB Frequency range 30Hz~12KHz Accuracy ±2.0dB at 1KHz (94dB level) AC output 0.65V RMS corresponding to each range step DC output 10mV/dB nominal Dimensions 2 5/8" (W) x 9 1/2" (L) x 1" (H) Weight 8 oz.