The MFJ-250X VersaLoad KW Wet Dummy Load lets you tune up fast! You can run 1KW CW or 2 KW PEP for 10 minutes. Or run 1/2 KW CW or 1 KW PEP for 20 minutes. Run continuous duty with 200 Watts CW or 400 Watts PEP. The dummy load comes complete with a derating curve. It uses a quality 50 Ohm non-inductive resistor. Use transformer oil with this dummy load (not included). The MFJ-250X Dummy Load has low VSWR to 400MHz. Under 1.2:1 to 30 Mhz. 1.5:1 for 30 - 300Mhz. 2:1 for 300-400MHz. Ideal for testing both HF and VHF rigs. Has SO-239 connector and vented for safety. Removeable vent cap. Carrying handle. 7½ inches high by 6 5/8 diameter.