In-the-canal (ITC) hearing aids sit comfortably in the ear canal. They are larger than the smaller IIC and CIC hearing aids, but are still small. A major advantage of ITC hearing aids is that they are large enough to permit wireless Bluetooth technology. With wireless Bluetooth connections, streaming devices can send sound from the TV or telephone dir ectly to both hearing aids. Also, hearing aids of this size can accommodate directional microphones, which can help people hear more clearly in background noise.