Small Digital Sound Level Meter BENETECH GM1351 - Powers on and displays on the LCD. - MIN/MAX button also works. - LCD backlight turns on in response to ambient light. - No liquid leakage or rust in the battery case. - Includes the main unit, instruction manual, and a 9V battery. Not all functions have been tested. Please understand that this is a used item, and only those who can judge from the photos and are satisfied with the condition should purchase. #BENETECH #SoundLevelMeter