resistance, frequency, period, capacitance, temperature, duty cycle, counter and DC source (provided for in subheading 9030.31.00) Free No change No change On or before 12/31/2020 . 1612. Multimeters Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.17.34 Digital multimeters, each having 8.5 digit resolution and having a recording device, certified by the importer as having 3 ppm direct current volts (DCV) accuracy (provided for in subheading 9030.32.00) Free No change No change On or before 12/31/2020 . 1613. Impedance analyzers having a frequency range of 20 hertz to 120 megahertz Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.17.35 Impedance analyzers, having a frequency range of 20 Hz to 120 MHz and plus or minus 42 V peak maximum output, each with 1 to 4 measurement channels, a recording device and a color touch screen measuring over 25 cm but not over 28 cm (provided for in subheading 9030.84.00) Free No change No change On or before 12/31/2020 . 1614. Electromagnetic interference receivers having a frequency band range of 3 hertz to 44 gigahertz Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.17.36 Electromagnetic interference (EMI) receivers, each having a frequency band range from 3 Hz to 44 GHz, conforming to LXI (Local area network eXtension for Instruments) standard, with two radio frequency (RF) inputs and with a color display screen with a display diagonal exceeding 20 cm but not exceeding 23 cm (provided for in subheading 9030.84.00) Free No change No change On or before 12/31/2020 . 1615. Oscilloscope calibration tools Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.17.37 Multifunction devices for calibrating electrical safety testers, each incorporating signal generator and multimeter, with a recording device (provided for in subheading 9030.84.00) Free No change No