Transistor Devices DLM50-20-100 Modular Electronic Load with 4 DLM 50-20-100 modules. 
Product Info: 
Operating Voltage: 3 - 50 Volts 
Load Current: 0 - 20 Amps 
Power Dissipation: 0 - 100 Watts 
Response Time: <50µS

EVALUTION NNOTES

21 JAN 16    Older unit, good condition.    JB