The RSFD2503C is a RoHS-compliant, surface mount diplexer manufactured by ROFS. It has a 1.8 x 1.4 x 0.61 mm size and is made up of two parts. It operates in the frequency range of 700-2700MHz, and has excellent filtering performance and low insertion loss, rejection, and return loss. This unit is perfect for applications such as WiFi, WiMAX, and GSM. It also provides protection of adjacent channel and intermodulation attenuation, making it ideal for small wireless systems.