brand new and high quality. Features: This broadband RF low-power amplifier is suitable for various types of 380-450MHz transmission use, such as wireless remote control and walkie-talkie. When inputting 0.1W, it can output 5.0W 7.2V power. The amplifier is equipped with a heat sink for long-term stable operation. Specifications: Working Frequency: 380-450MHz Input Power: 0.1W (20dBm) Maximum Output: 2.5W (34dBm) 5.0V power supply; 5.0W (37dBm) 7.2V power supply; 8.0W (39dBm) 10.0V power supply (not recommended) Working Voltage: 5-7.2V (for DC) Working Current: 1-2A (determined by output power) RF Connector: Standard SMA female Material: Metal and Plastic Dimension: approx.50x50mm/1.97x1.97in Main Color: Green Quantity: 1 Pc Note: No retail package. Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Includes: 1 x RF Power Amplifier