... )-5~-7Adjustable Step(dBm)<0.5Adjustable Range≥5Stability(dB,30min,20°C)0.15Modulation(Hz)CW, 270,330,1K,2KFiber PortFC ... ModelsJW3116 Optical Light Source, 3pcs 1.5V Batteries, Power Adapter, User Manual, , Cotton Stick and Soft Carrying Case.