From website (https://www.americanrecorder.com/products/sound-level-meter-1?_pos=3&_sid=05c65f5ec&_ss=r)
NOTE: version for sale is an older version of the same meter--no cable possible, and 9 V instead of 4 AA batteries)
Accurate and easy to use for all types of sound level measurement including recording, performance, surround sound, industrial and environmental. Large LCD Display, Two Mode Settings, Data Hold & Max Hold, A&C Weighting,
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" electret condenser Accessories: Windscreen
Calibration: Electrical calibration with the external oscillator (1kHz sine wave) Not included.
Display Type: LCD
Display Digits: 4
Display Resolution: 0.1dB
Display Up Data: 0.5 sec.
Time Weighting: FAST (125mS), SLOW (1 sec.) Level Ranges: Lo: 30-100dB; Hi: 65-130dB
Accuracy: +- 1.5dB (under reference conditions)
Alarm function: "OVER" is show when input is out of range
Maximum Hold: Maximum value with decay <1dB/3 minutes
Power Supply: 9V battery
Programable Power Auto Shut-Off: Approx 3 min or by-pass
Power Life: 50 hours (alkaline battery) Operations Temperature: 0 to 40 C (32 to 104F) Operation Humidity: 10 to 90% RH
Operation Altitude: 2000 meters (6560 feet) Storage Temperature: -10 to 60 C (14-140F) Storage Humidity: 10 to 75% RH