... . It can connect up to 16pcs 433Mhz wireless sensor, once sensor trigger, the panel will make a loud alert ... security.Package Included:SIMPAL-B3 Panel: 1PCSRemote Control: 2PCSDoor Sensor: 2PCSDoorbell Button: 1PCSAC adaptor: 1PCSManual: 1PCS Advanced Functions: ... work with 433Mhz wireless sensors (8 sensor Zones), such as door magnet, PIR sensor, smoke sensor, gas sensor etc. The SimPal-B3 can ...