The Smartwares SH4-90451 is a wireless switch operating at 433 MHz FSK, designed for easy control of electronic devices. Manufactured by Smartwares, this switch is typically used in home automation systems to enable remote operation of lights and appliances. Its main features include hassle-free installation and reliable wireless connectivity. https://elecena.pl/product/28706007/smartwares-sh4-90451-basic-wireless-switch-waterproof-outdoor-use-1000w 2025-05-16 https://elecena.pl/product/28706007/smartwares-sh4-90451-basic-wireless-switch-waterproof-outdoor-use-1000w 2026-07-03