The BTLB001109KXVHBA10 is a RF filter made by Chilisin. It is a surface-mount device (SMD) with a size of 0.9x1.1mm. The filter is designed for use in radio frequency (RF) applications such as receivers, transmitters, and transceiver circuits, and it meets the requirements of the Restriction of Hazardous Substances (ROHS) directive. It offers excellent filter performance, low insertion loss, good noise rejection rate, and high temperature stability. The filter has low pass, band pass, and high pass filter characteristics, making it ideal for a wide range of RF applications.