The Radio 4428 B3, with model number Ericsson KRC 161 713/1, is a remote radio unit designed for wireless communication. It operates in the B3 frequency band, which typically corresponds to around 1800MHz. The radio unit is intended for deployment in cellular networks to provide wireless coverage and capacity.

The Ericsson 4428 B3 supports multiple technologies and features, including advanced radio capabilities such as carrier aggregation, which enables the aggregation of multiple frequency bands to increase data rates. It is equipped with dual transmitters, allowing for improved signal transmission and reception.

The radio unit is designed to be compatible with Ericsson's base station systems and can be seamlessly integrated into existing network infrastructure. It supports various network architectures and is capable of delivering reliable and high-quality wireless connectivity.

Overall, the Ericsson Radio 4428 B3 KRC 161 713/1 is a versatile radio unit that provides enhanced coverage and capacity for cellular networks operating in the B3 frequency band.