Feature: 1. The amplifier can be configured with traditional VGA mode applied to external voltage control, and a square law detector is integrated inside, so it can also work in automatic gain control mode. 2. There are two working modes for the amplifier, that is positive gain mode (MODE terminal connected to high level) and negative gain mode (MODE terminal connected to low level). 3. Able to achieve precise log‑linear gain control with a gain control range of 45 dB. 4. Shielding shell and anti‑reverse connection protection diode, it is more at ease when working. 5. Professional manufacture ensures you higher quality products, you can buy it with ease. Specification: Condition: 100% Brand New Item Type: Signal Amplifie Module Material: PCB Color: As Pictures Shown Working Frequency: DC-500MHZ Supply Voltage:+5V DC (Typical Current Value 200mA/at Maximum Gain Output) Input and Output Impedance: 50Ω Maximum Output Amplitude: 27dbm (200Ω) Variable Gain Range: 45dB Control Voltage Range: DC0-1V Analog Gain Control Voltage Range: 50mV -950mV Control Sensitivity: 20mV/dB. Package List: 1 x Variable Gain Amplifier