Feature: 1. ATTENUATION RANGE AND STEP SIZE: The RF programmable attenuator has a attenuation range of 0 to 31dB and a step size of 1dB 2. FREQUENCY AND SIGNAL: The maximum working frequency range of RF attenuator is 1MHZ‑3800MHz, and the maximum power of input signal is 20dBm 3. WIDE APPLICABLE: Variable RF attenuator use universal RP SMA interface, suitable for a variety of instruments 4. IMPEDANCE AND POWER SUPPLY: The input and output impedance of digital RF attenuator module is 50Ω, and the power supply adopt miniUSB 5V 5. RELIABLE PCB: Digital RF attenuator module adopt excellent PCB material, with high reliability and miniaturization, good maintenance and interchangeability Specification: Item Type: RF Programmable Attenuator Operating Frequency Range: 1 ~ 3800MHz Input Signal Maximum Power: 20dBm Attenuation Range and Step: Attenuation range from 0~31dB, step size is 1dB Insertion Loss: Less than 2.0dB Attenuation Control: Press OK key, press + after the attenuation digit blinks, - key to control actual addition or subtraction, press OK again to confirm Input Output Impedance: 50Ω Power Supply: MiniUSB 5V Input Output Interface: RP SMA interface. Package List: 1 x RF Programmable Attenuator1 x USB Cable