Low noise amplifier: The C919 low noise amplifier with excellent low noise performances, effectively improving reception quality.3-5V power: suitable for power environment, easy for users to choose the appropriate power according to their needs.Highly sensitivity: Provides powerful enhancement function, which can and amplifying weakStrong stability: Reliable circuit design and materials are used to stable performances.Small and portable: small in size, light in weight, easy to carry and install. Model Name: C919 Low Noise Amplifier Noise coefficient: 0.6dB Power supply: 3-5V Frequency: 10KHz-6GHz Due to different batches, the appearance, color and printed words of the product , which will not affect the use. Colour:Black Material:PCB Package Contents: 1x C919 Low Noise Amplifier Only the above package content, other products are not included. Note: Light reflection 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.