Features: 915MHz RF Power Amplifier for Band 890-960MHz Output power of 4W High frequency stability, providing reliable signal amplification and transmission; Significant power amplification effect, enhances the wireless communication ranging Stable performances ensures efficient RF signal enhancement Wide ranging of operating frequencies, suitable for a variety of RF application scenario;temperature and pressure resistance, suitable for use in a variety of harsh environment. Communication equipment manufacturers, RF technology engineers and related industry professionals for RF signal enhancement applications in wireless communication base stations and other equipment Signal enhancement and expansion in areas with poor communication networking coverage Signal amplification and transmission experiments in RF laboratories and electronic engineering projects Specifications: Operating frequency: 890-960MHz Power: 4W Operating current: 1.3A (4.2V, recommended operating) Supply voltages: DC4.2V System impedance: 50ohms Overall Size：about: 70.5x82.5x24.5mm/2.78x3.25x0.96in Product weight: 88g Package Includes: 1PC RF Power Amplifier 915MHz note: Prohibit the use of load impedance serious mismatch in prolonged firing. Do not raise the operating voltages to use, although it can bring the power increase, but the products power consumption increases, the reliability becomes worse. There is a common grounding point between the equipment, when using the RF is connection first, and then power.