The RTL8189ES-VB-CG with QFN-32 RF Transceiver ICs ROHS is a product manufactured by Realtek. It is a single-chip 2.4GHz 802.11n 1T2R WLAN CMOS Transceiver that supports up to 150 Mbps data rate and includes an integrated power amplifier, LNA, Power Detector, and T/R switch. It uses a CMOS process to achieve high integration, low power consumption, and low cost. The package of the IC is QFN-32. It is RoHS compliant, which means it does not contain any hazardous substances in its manufacturing process, thus leading to the environmentally safe operation. The transceiver can be used in various wireless applications such as smartphones, WLAN routers, WLAN USB adapters, and tablets.