SOUND LEVEL METER Tenmars Autoranging Sound Level Meter with Datalogger (Model No.: TM- 103) Display 3 1/2 digits LCD display with maximum reading of 2000. Backlit LCD Features Test ranges : 30~130dB. LO: 30~80dB MED: 50~100dB HI: 80~130dB Accuracy : +/- 1.5dB(ref 94dB @1KHz) Resolution : 0.1dB Microphone : 1/2?inch Electret condenser microphone Frequency Weighting : A, C Time Weighting : FAST,SLOW Datalogger 14,000 records Auto Ranging, Auto Power Off, Data hold, Max/Min, RS-232 interface software for data download to Windows compatible PC. Dynamic Range : 50dB Frequency Range : 30Hz~8KHz Dimensions Size : 200x55x38mm Weight (including battery) : 290g Accessories Instruction manual, Carry case 9V battery Orange protection cover