The button need to be paired with the receiver then the unit can work. ^^ Wireless call button/Transmitter work with CallToU Receiver(B07C3R6JRV, B08BZVBKBW, B0825JTMMK, B07M65TL51, B07KXQL9WY, B083K545TW, B07FL9T4BY, B085SXB9FZ, B08C363DKN, B08C2Q51FL, B077VMC89R, B077SYPD5K, B078BQKT23, B075VM7TYD, B07H29R7JD, B07P1Y3N14, B07C1H4J5D, B073S62TK1) ^^ Smart wireless nurse call button allows a patient or an elderly to press a button requesting assistance ^^ Wireless transmitters configure with wireless pager for restaurant, coffee shop, hospital service alert