Wideband Adjustable gain Low Noise Amplifier for RTL SDR receiver The PCB size is only 25 x 30 mm. The circuit can be powered via a standard microUSB connector (using an USB cable from PC, or using any cellphone charger with microUSB plug), or it is also possible to power the amplifier via the onboard terminal points from an external power supply. You can connect any power source with output voltage from 7 V to 12V DC Operating Frequency: 1MHz to 3GHz RF Gain adjustable: -20dB to +19dB Noise: 1.8-2.1dB Connector.The item "Wideband Low Noise Amplifier LNA SDR RTL preamplifier HF VHF UHF Receiver HAM" is in sale since Wednesday, October 13, 2021. This item is in the category "Consumer Electronics\Radio Communication\Ham, Amateur Radio\Ham Radio Amplifiers". The seller is "janielectronics" and is located in Kunszentmiklós, default. This item can be shipped worldwide.