used in SSB, AM linear power amplifier, the CW, FM, power amplifier, and the most basic signal amplification.Easy installation and operation.Low noise, high cost performance, very suitable for DIY enthusiasts.Our product is sent by parts, which not include heat radiator, please help yourself to assemble.The overall gain more than 40db, which is 10000 times, 10W input 1mW output.Input Power: 1-5mWOutput Power: 45W (Max.)Input Voltage: DC 13.8V 10A or higherMax. Output Power: 57W (not with cooling fin)Output Impedance: 50 ohm, can according to need to adjustbetween 10-200 ohmInput Frequency Range: 3M-30MHz(HF channel)Input/Output Interface: Standard SMA interface, externalthread holePCB Size: 60 x 100 mmDiameter of Located Hole: 3mmColour:Photo ColorMaterial:plasticPackage Contents:1 x RF Linear Power Amplifier Diy KitsOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.