... 2).Accuracy: +-2dB 3).Aux Output Jacks TES-1350A Noise and Sound Level Meter LAESENT Reliable in Quality Sound Level Meter ... conditioned, 0.65Vrms corresponding to each range step, impedance: 600 W DC conditioned, 10mV/dB (nominally)Operating Condition 0 to 40 ... 1/2 digitalsPower Supply one 9V batterySize 240mm(L)x68mm(W)x25mm(H)Weight 210gAccessoriesInstruction Manual, 9V Battery, Carrying Case, ...