Clarity AlertMaster Personal Signaler (CLARITY-AM-PXB) Portable notifier with LED icons to alert a user of activity from the AM-6000 or AM-100 system up to 80' away, Vibrating alert, alarm clock alert, doorbell alert and telephone alert notifiers when main unit is connected to optional accessories, Designed for people with moderate to profound hearing loss, ideal for the deaf or low vision, Includes belt clip, NiCd AA rechargeable battery and AC adapt