Oticon SafeLine - BTE is a safety lanyard for your hearing aids that allows you to wear your hearing aids all day without losing them, regardless of activity. With SafeLine - BTE, you attach your hearing aids to your clothes using a clip. With your hearing aids securely in place, you can continue to enjoy the sounds of your life without worrying about losing your hearing aids. With SafeLine, your hearing loss doesn't have to limit you. SafeLine - BTE fits behind-the-ear (BTE) hearing aids.