Hearing X3 sound to the ear), open behind-the-ear (a behind-the-ear (BTE) piece attached to a slim, clear tube that delivers sound to the ear), behind-the-ear (a behind-the-ear (BTE) piece using a tube to attach it to a customized ear mold that fits securely into the ear with maximum amplification and longer battery life), completely-in-the-canal (smallest custom hearing aid available, the CIC fits deeply inside the ear canal making it almost invisible), in-the-canal (custom-made to fit almost entirely inside the ear canal, https://www.healrun.com/hearing-x3/