ElectronicsThe NDFH004-2350SA is a SAW (Surface Acoustic Wave) filter manufactured by HUAYING Electronics. This filter is designed for a wide range of applications, such as mobile communications, audio/video, automotive, and medical applications. It is constructed with a tiny 1.1x0.9mm SMD (surface-mount device). It is RoHS compliant, meaning it is free from hazardous materials such as lead, mercury, and other components that are banned due to environmental concerns.