Features: 1) Selected superior quality module, such as 2609B 2) Low noise amplifier and ASK3 power multiplication amplifier in the last level 3) 2 - 4 lines RF output with max. level at 4 x 108dBuV 4) Can monitor the voltage of the input optical power 5) Optical receiving status is displayed by LED 6) When over voltage, over current or lighting strike happen, it can achieveautomatic protection and automatic reset