... correct Bench-top optical Power Meter(Dual Channel) JW3201ND is updated version of JW3201 dual channel bench-top power meter. Targeting at the PLC encapsulation technology, JW3201ND power meter could monitor the dual channel power simultaneously ... ModelStandard Package ListJW3201N0/N1/N2Bench-top Power MeterMain Unit, External Detectors for N1 and N2, RS232 cable, Power supply Adapter, Software CD, ...