The Smartwares SH4-99564 Switch operates on a frequency of FSK 433 MHz. It is a single unit switch ideal for wireless control of devices. Typically used for remote operation of lights or appliances, it enhances automation and convenience in households. https://elecena.pl/product/28706003/smartwares-sh4-99564-fsk-433mhz-light-control-indoor-smart-switch 2025-05-16 https://elecena.pl/product/28706003/smartwares-sh4-99564-fsk-433mhz-light-control-indoor-smart-switch 2026-07-03