Large Screen Display Noise dB Meter Wall Hanging Sound Level Meter Monitor USB data transmission audio meter 32x17cm Multifunction: USB Connect to computer Large screen display Upper limit setting Over limit alarm setting External alarm output Alarm for time setting Multiple fixation methods Accurate measurement External power supply Parameters: Measurement range:30dB~130dB Accuracy:1.5dB Measurement range:31.5Hz~8.5KHz Frequency weighting:A Weight Response time:Fast,about 2times/seconds Sensor tvpe: 6mm capacitive microphone sensor Digital display: 3digits Resolving power: 0.1dB(100dB) Alarm mode: sound + display Alarm output: 5v high level Refresh rate Storage function: 2 times /seconds Computer Communication:YES Power supply: 5V 1A MicroUSB interface Working temperature and humidity: 0-40C , 10-80%RH Storage temperature and humidity: 0-40C , 10-80%RH Over range display:op digit shows "Hi" or "Lo" Product power supply: AC input, output 5V 1A adapter Product size: 323 x 173 x 40mm (12.71 x 6.for 81 x 1.57in) Product weight:about 980g Package included: 1x GIFT BOX 1x HOST 1x ENGL/SH INSTRUCTION 1x POWER USB 2x HANG/NG HOOK 2x SCREW