This part is a kind of semiconductor called TR3100.

Function of this product has 433.92 MHz Hybrid Transceiver.

Manufacturers : RF Monolithics Inc

Image and pinout :

Some of the text within the PDF file :

® · Designed for Short-Range Wireless Data Communications · Supports RF Data Transmission Rates Up to 576 kbps · 3 V, Low Current Operation plus Sleep Mode · Stable, Easy to Use, Low External Parts Count The TR3100 hybrid transceiver is ideal for short-range wireless data applications where robust operation, small size, low power consumption and low cost are required. The TR3100 employs RFM’s amplifier-sequenced hybrid (ASH) architecture to achieve this unique blend of characteristics. All critical RF functions are contained in the hybrid, simplifying and speeding design-in. The receiver section of the TR3100 is sensitive and stable. A wide dynamic range log detector, in combination with digital AGC and a compound data slicer, provide robust performance in the presence of on-channe [ ... ]

TR3100 PDF Datasheet Download