Features 1、SUPERIOR CONSTRUCTION: Power amplifier module is manufactured from aluminum alloy materials, ensuring it surpasses ordinary amplifiers in both durability and performance, providing you with a long lasting solution. 2、UHF FREQUENCY OPTIMIZATION: UHF frequency bands, this amplifier module requires 50 ohm characteristic impedance coaxial cables for both input and output. Using standard wires may lead to issues like low output power and erratic behavior. 3、50 OHM OUTPUT IMPEDANCE: The amplifier features a 50 ohm output impedance, making it essential to connect it to a 50 ohm load, such as antennas or the next stage of equipment. Do not empty load, empty load will damage the power amplifier. 4、SAFE INSTALLATION: Due to the high output power, avoid connecting the antenna directly to the amplifier input. Instead, use a minimum of 2 meters of 50 ohm coaxial cable to connect to the antenna, preventing strong signal interference that can disrupt proper amplifier function. 5、UNIDIRECTIONAL WORKING: This power amplifier board is a unidirectional power amplifier, which can only work in one direction, and can not be used in two way data transfer and other equipment that needs to receive signals. Specification Item Type: Power Amplifier Module Material: PCB + Aluminum Alloy Input Power: 20-23dBm (0.1-0.2W), can also work with input power below 0.1W, output power will increase with input power and reach maximum power point. Operating Voltage: 5-8.4V (typical battery supply voltage) Operating Current: 1.6A (Maximum) Input Impedance: 50 ohms Output Impedance: 50 ohms Input Output Terminal: SMA K female (male thread inner hole) Package List 1 x Amplifier Module 2 x Accessories