1.Operating frequency: 2.4-2.5GHz (2.45GHz) 2.Output power:40W (46.2dBm 24V, RFin=17dBm (50mW));50W (47.5dBm 28V, RFin=17dBm (50mW)) 3.Operating voltage: 24-28V (24V is recommended) 4.Operating Current: 5.0A (depending on supply voltage) 5.System impedance: 50 ohm Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Connector type: SMA female connector (external screw and internal hole) Important reminder: Before using the amplifier modules, the instruments and equipment should be connected to the same ground (no potential difference) and then connected with cables. The load must be connected. It is strictly forbidden to use it without load. Be sure to pay attention, especially the power amplifier. Be sure to use a "regular" antenna, especially when using the antenna as a load, be sure to that the impedance of the antenna is matched within the working frequency (generally the voltage standing wave ratio is required to be less than 2.0). It is strictly forbidden to use "irregular" antennas; such as: rod antennas, copper wire antennas, and very cheap antennas, which have no definite impedance. Try to use a linear power supply for the power supply, especially when using a low-noise amplifier, you must use a linear power supply or a battery. The noise of the switching power supply itself is very large, and this noise be connected to the amplifier circuit. Do not use a switching power supply. Color: As shown Material: Metal Package Contents: 1 x 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.