The SKY13551-668LF from Skyworks Solutions is a RF Switch with Frequency 0.4 to 3.8 GHz, Insertion Loss 0.40 to 1.6 dB, Isolation 15 to 42 dB, Power 31 dBm, Power 1.2 W. Tags: Surface Mount, Antenna Tuning Switch. More details for SKY13551-668LF can be seen below.