... with high brightness 1.Product Name:21000 Count Bench Multimeter(80)21,000/51,000- count display Large VFD dual display ... +dBm synchronously displayed Measurement speed up to 15 times/second (80), and 30 times/second (81)DCV measurement accuracy up to ... accuracy ComparatorTo judge HI, IN, LO and display, with ALARM at HI/LO(selectable) Communication interface RS232C, SCPI