Array 3721A Programmable DC Electronic Load 400W 80V 40A RS232

Up for sale is a high-performance Array 3721A Programmable DC Electronic Load. This unit features a versatile input range of 0-80V, 0-40A, with a maximum power capacity of 400W. Ideally suited for testing DC power sources, batteries, and solar cells.

PC218 Phase Polarity Tester Checker Detector Speaker Microphone Sound Testing

Which is the necessary testing tools of sound engineering installation and commissioning. and can be used for the phase accuracy test of any Sound System. The system consists of two hand-held units, PC218-A pulse can produce their own sound signal and then output the sound signal of 1Hz 1 second through XLR for PC218-B to testing.