The AK1051D is a QFN-32 (Quad Flat No-Lead Package) Radio Frequency Transceiver IC that is manufactured by NYKA. This part is compliant with RoHS (Restriction of Hazardous Substances) standards. It is a fully integrated single-chip transceiver that operates in the 2.4 GHz industrial, scientific, and medical (ISM) band that is suitable for a wide range of wireless systems. This IC has a wide range of features, including frequency hopping spread spectrum (FHSS), gain-controlled transmission (GCT), fast frequency hopping transition (FFHT), and a low-noise receiver. It also has a transmitter output power range of up to +20 dBm, an adjustable Tx power, and an asynchronous serial port with UART interface.