◇DISPLAY 3 1/2 digits LCD Digital display ◇FUNCTIONS Backlight display Auto Range, Auto Power off Function keys : Max/Min Function Test ranges : 30 to130 dB (DS-103 in 6 ranges) A＆C Frequency Weighting Fast ＆ Slow dynamic characteristic models RS-232 interface (DS-103) for capturing data directly on a PC, optional Windows® compatible software ◇ACCESSORIES User’s manual Carrying case Battery 9V x 1 pc ◇POWER SUPPLY Battery type : 9V NEDA 1604, IEC 6F22, JIS 006P x 1 pc Battery life : 50 hours (with alkaline battery) ◇OPERATION CONDITION Operation Condition : 5℃ ~ 40℃ (＜80﹪RH.) Storage Temperature : -10℃ ~ 60℃ (＜70﹪RH.) ◇DIMENSION Meter : 280x80x32mm (LxWxH) Weight : about 290g (battery included)