The module must first connect the input terminal (RFin) and output terminal (RFout), and finally connect the DC power supply. When supplying DC power to the module, make sure to connect the positive and negative DC poles correctly. Don't reverse connect it. Otherwise, it cause module damage. Working frequency: 25MH-1200MHz Input and output impedance: 500 Gain: 40dB (typical value) Input power (MAX): 7dBm (5mW) Output power (MAX): 36dBm4W Supply voltage (DC): 24V-28V Working current: 1.1A (typical value) Classic input power: 3dBm (2mW) @ 24V Classic output power: 37d8m-34.5d8m (5W2.5W) @ 24V varies with frequency Recommended supply voltage: 24V Connector type: SMA (external thread inner hole) Colour: Silver+Black Material: Aluminum Alloy Note: Different batches may have different appearance label printing, which not affect the use Package Contents: 1x Power 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.