Model 831 is the newest Sound Level Meter fromLarson Davis with capabilities not found in other meters: USB powered, ANY LEVEL > TM datarepresentation, huge data storage, and remote access technologies that fit your ֓real life needs and expectations. The rugged, ergonomic design is ideal for one-handed operation, right or left.The 831 can be used with a complete range ofmicrophones and preamplifiers including weather-resistant units for unattended and semi-permanent monitoring applications.As with all Larson Davis equipment, this productis complemented with toll free applications assistance, 24-hour customer service, and is backed by a no-risk policy that guarantees satisfaction or your money refunded. > Acoustic Test Products Group size="-1">

✓ Precision integrating sound level meter, ANSI S1.4 type 1,IEC 61672 class 1 ✓ Jack for AC/DC output or Headset microphone and speaker ✓ Voice annotation recording with playback, from headset or measurement microphone ✓ Single measurement range from 20 to 140 dB SPL ✓ 120 MB standard data memory, expands up to 2GB ✓ Digital audio recording of events and interval start ✓ 160 x 240 graphic LCD display with backlight and icon driven user interface ✓ Detachable preamplifier with up to 30m (100 feet) microphone extension cable (full scale to 20 kHz) ✓ Elastomeric illuminated keypad with Quiet TouchӔ...