Velleman MK139 CLAP ON/OFF SWITCH Features operate your lighting simply by clapping your hands ideal for disabled or elderly people good immunity against surrounding noises '1-clap' or '2-clap'-mode selection '2-clap'-mode features built-in safety turn-off timer (approx. 5h) output relay 'pulse' or 'toggle' selection microprocessor-controlled output relay with LED indicator Specifications relay https://elecena.pl/product/23425404/clap-on-off-switch 2023-05-11 https://elecena.pl/product/23425404/clap-on-off-switch 2025-07-09