Applications: Suitable for amateur (HAM) radio, RF amplification and signal test equipment to enhance signal strength and quality Technology: Adopts advanced passive frequency multiplication technology to effectively increase frequency without additional power Manufacturing quality: Rugged structural design, reliable and in operating environments Easy integration: Compact module can be easily integrated into existing equipment with only a few adjustments Specification: HMC189: DOUBLER, 2 - 4 GHz INPUT, Conversion Loss: 13 dB, Fo, 3Fo, 4Fo Isolation: 33 dB, Input Drive Level: +10 to +15 dBm Interface type:SMA external thread internal hole The product appearance and printed words depending on the batch, but this does not affect use. Color:As Shown Material:PCB Package Contents: 1 * Passive Frequency Doubler Module 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.