... otherwise. All specifications assume a 10 minute warmup period.1,DC Voltage Measurement Range Maximum measurement rangeResolution Accuracy(% ... of reading + Counts)ETX-1815ETX-2015100Hz1~99.999Hz0.001Hz0.02+10.01+11000Hz100~999.99Hz0.01Hz10kHz1k~9.9999kHz0.1Hz100kHz10k~ ... 1815 Users Manual2,Optional Accessories6 R03-model rechargeable batteries 1 Metal Box Current and Voltage Calibrator,Volt Calibrator, ...