Product Details: Model Name/Number SL-4012 Brand Lutron Weight 295 gm Measurement Range 30 - 130 dB Frequency 31.5 Hz to 8,000 Hz Dimension 268 x 68 x 29 mm Power Consumption Approx. DC 6mA Microphone Size 1/2 inch standard size Operating Temperature 0 to 50 Degree Celsius ( 32 to 122 Degree F) Operating Humidity Less than 80% RH Display Size 52 mm x 32 mm Country of Origin Made in India Features: IEC 61672 class 2. Auto range & manual range. A & C frequency weighting. Fast & Slow time weighting AC output for system expansion. RS232 computer interface. External calibration VR. Hold & Memory record. High accuracy condenser microphone Peak Hold. Over and under load indicator. LCD display. Durable, strong light weight ABS-plastic housing case. Additional Information: Pay Mode Terms: Other