These are units that combine the alert of a doorbell and the alert of a telephone ring into one system.
For Sonic alert receivers only go here: Sonic Alert Receivers.

For Ultratec receivers only, go here: Ultratec Receivers

(SA-DS80) Notification Devices Basic Doorbell/Telephone Signaler (wired) This will alert you to the doorbell and the telephone.. Simply plug the phone cord into a modular phone jack. Will NOT send a signal to remote receivers. MSRP: $49.95 Your Price: $47.00 Qty: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

(SA-DS800) Notification Devices Deluxe Doorbell/Telephone Signaler (wired) This will alert you to the doorbell and the telephone. Simply plug the phone cord into a modular phone jack. It will send a signal to remote receivers (sold separately) For extra receivers go here: Extra receivers. MSRP: $74.95 Your Price: $72.00 Qty: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

(ND-UT-PDLTW) Notification Devices Ultratec Combination Telephone and Wireless Doorbell Signaler An all-in-one signaler that will let know when the phone is ringing or someone is at the door. A cost-effective way to be alerted to a doorbell or telephone alert--it will flash the lamp you plug into it or any lamp you plug into one of its remote receivers (optional) or even an Add-On Strobe light (optional) For accessories such as a strobe or extra receivers, please go here: Ultratec Strobe/Receivers . MSRP: $109.95 Your Price: $104.00 Qty: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20