Amazon offers the Dr. Meter MS10 Digital Decibel Sound Level Meter Tester on sale for a low $13.99 via coupon code "UYZ98DYT" plus free shipping on orders above $35, or with Amazon Prime. Limited time offer. You save $16 off the price! That's the lowest price we could find. This has a 4.1 out of 5 star rating with over 230 reviews on Amazon.

• Compact & lightweight design; uses 9V battery (included)
• Perfect for measuring noise levels in factories, audio systems, etc.
• Range: 30dBA ~ 130dB; accuracy within +/-1.5dB
• Large LCD screen display; 15 minutes auto power off