Optimal Frequency Range: This 915MHz power amplifier is designed for 820-970MHz, ensuring excellent performance for amateur radios and walkie-talkies High Power Output: Delivers a powerful 15W of power, enhancing signal strength and communication range, perfect for a variety of radio applications Versatile Compatibility: Perfect for a variety of amateur radios and walkie-talkies, ensuring wide device compatibility Design: Built to last, this power amplifier can withstand rigorous use in a variety of environments, making it a reliable choice for radio enthusiasts Operating frequency: 820-970MHz (860MHz, 915MHz) Output power: 13W (41dBm@24V, RFin=17dBm (50mW)) 15W (42dBm@28V, RFin=18dBm (65mW)) 20W (43dBm@28V, RFin=20dBm (100mW)) Operating voltage: 20-28V (24V recommended) Operating current: 1.6A (slightly different depending on the supply voltage) System impedance: 50 ohms Dimensions: 59 x 31 x 13.5mm (excluding connector) Connector model: SMA female (external screw inner hole) Note: an external heat sink is required Due to different batches, there may be differences in product appearance, color, and printed text, which not affect the use. Color: silver Material: Metal Package Contents: 1 * 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.