10-10KHz continuous adjustable, 1Hz step[1]by-step. Testing frequency. 0-1500mV adjustable, at a step of 1mV. 0.01~2V adjustable, at a step of 1mV. The limit range of screening can be set to -50% ~+ 50%, and the fixed points are 1%, 5%, 10% and 20%.
eBay