The SATP25-5-30-3.5-B from Sainty-Tech Communications Limited is a RF Variable Attenuator with Frequency DC to 3.5 GHz, Attenuation Range 0 to 30 dB, Attenuation Step 1 dB, 2 dB, 4 dB, 8 dB, 16 dB, Attenuation Accuracy ±3 dB, Power 25 W. Tags: Module with Connectors, Pushbutton. More details for SATP25-5-30-3.5-B can be seen below.