This part is a kind of semiconductor called B9006.

Function of this product has SAW Components.

Manufacturers : EPCOS

Image and pinout :

Some of the text within the PDF file :

SAW Components Data Sheet B9006 SAW Components Low-Loss Filter for Mobile Communication Data Sheet B9006 881,5 MHz Chip sized SAW package DCS6Q Features s Low-loss RF filter for mobile telephone GSM850/AMPS system, receive path s Usable passband 25 MHz s Unbalanced to balanced operation s Impedance transformation from 0,075 0,45 0,075 0,68 1,6 1 2 3 50 Ω to 200 Ω s Suitable for GPRS class 1 to12 s Ceramic package for Surface Mounted Technology (SMT) bottom view 6 5 4 0.38 side view Terminals s Ni, gold-plated 2,0 top view Dimensions in mm, approx. weight 0,006g Pin configuration 2 4, 6 1, 3, 5 Unbalanced input Balanced output To be grounded Type B9006 Ordering code B39881-B9006-E710 Marking and Package according to C61157-Z7-C208 Packing according [ ... ]

B9006 PDF Datasheet Download