As of August 2018, the SF530ES and SF531ES are discontinued. These parts were used in the Tek-CARE500 system. The SF530ES was a Wireless Single Resident Bed Station and was replaced with the SF521ES/UL. The SF531ES was a Wireless Emergency Call station and was replaced with the SF523ES/UL.
For more information, please contact the sales department at 800.327.8466, option 2.