Sound Level Meter  AR824     GENERAL FEATURES & SPECIFICATIONS     Measuring Range 30~130dBA 35~130dBC Accuracy +/-1.5dB Frequency Range 31.5HZ-8.5KHZ Linearity Range 50dB AC/DC Output v Auto Power Shut Off v Low Battery Indication v Over Range Indication v Digit & Resolution 5Digits & 0.1dB Time Weighting Selection Fast/Slow Microphone 1/2 Inch Electret Condenser Microphone Frequency Weighting A & C Frequency Weighting v Max Hold Function v RS232 PC Interface - Calendar function - Sampling Frequency 2 times/sec     GENERAL CHARACTERISTICS     Power 9V (Alkaline or DC Adapter) LCD size 30x50mm (1.18x1.97 inch) Product Color Ivory Product Net Weight 300g / 0.66lb (include battery) Product Size 265x70x35mm (10.4x2.76x1.38 inch)     PACKING INFORMATION     Packing Gift box Standard Quantity Per Carton 20 Standard Carton Size 625x450x285mm (24.6x17.72x11.22 inch) Standard Carton Gross Weight 17.2kg / 37.85lb Packing2(other countries) Blister Standard Quantity Per Carton 20 Standard Carton Size 410x375x332mm (16.2x14.8x13 inch) Standard Carton Gross Weight 6.2kg / 13.64lb