Buy this versatile MTP ST-805 with LCD display that performs the sound measurements according with IEC651 type 2, ANSI S1.4 type 2 standard. Combined great features such Data Hold or MAX Hold function. 

Features:

• Fast response time, high performance
• Range from 30 to 130dB with 0.1dB resolution;
• 1/2" electret condenser microphone for high accuracy and long-term stability
• Data Hold, Max Hold functions
• Tripod mount for long-term monitoring
• A & C frequency weightings
• Fast & slow dynamic characteristics model
• Low battery indication

Specifications:

• Standard applied : IEC651 type 2, ANSI S1.4 type 2
• Frequency range : 31.5Hz~8KHz
• Measuring level range : 30~130dB
• Frequency weighting : A/C
• Microphone : 1/2 inch electret condenser microphone
• Calibration : Electrical calibration with the internal oscillator (1kHz sine wave)
• Display : LCD Digital display : 4 digits
• Resolution: 0.1dB Display
• Up data: 0.5 sec.
• Time weighting : FAST(125mS), SLOW(1 sec.)
• Level ranges : Lo: 30-100dB; Hi : 60-130dB
• Accuracy : + 1.5dB (under reference conditions)
• Alarm function : “OVER” is show when input is out of range
• Maximum hold : Hold readings the Maximum Value, with decay < 1dB/3minutes.
• Auto power off : Meter automatically shuts down after approx. 15 minutes of inactivity.
• Power supply : One 9V battery, 006P or IEC 6F22 or NEDA 1604.
• Power life : About 50hrs(alkaline Battery)
• Operation temperature : 0 to 40℃(32 to 104oF)
• Operation humidity : 10 to 90%RH
• Storage temperature : -10 to 60℃( 14 to 140 oF)
• Storage humidity : 10 to 75%RH
• Dimensions : 210(L)X55(W)X32(H)mm
• Weight: 230g(including battery)
• Included: 9V battery, carrying case, Instruction manual.