Specification: Power : 0-200W Measurement Precision of 5W input: AVG +/- 10{0e3fbd49920d66d312335c9ab31e3d7b441ff7521e58af8d4d0648ba5d548198}; PEP +/- 15{0e3fbd49920d66d312335c9ab31e3d7b441ff7521e58af8d4d0648ba5d548198} Measurement Precision of 20-200W input:AVG +/- 5{0e3fbd49920d66d312335c9ab31e3d7b441ff7521e58af8d4d0648ba5d548198}; PEP +/- 10{0e3fbd49920d66d312335c9ab31e3d7b441ff7521e58af8d4d0648ba5d548198}