T Tocas 1.5" Digital Nubmer on Wall Sound Level Meter, 30~130 dB Decibel Noise Measurement 1.5-inch Digital Number Display Indoor Real-time Sound Level Meter Wide measuring range: 30 ~ 130 dB DC 9V/2A supply,Power cable length:110cm/3.6ft Conformed to the IEC651 Type2 and ANSIS1.4 Type2 standards Ideal for home, office, factory, hospital, theater, or audio system ect.