Link: [https://www.ebay.co.uk/itm/New-Wireless-Switch-Receiver-Kit-Removable-Self-powered-Transmitter-w-Receiver/332515531459?ssPageName=STRK%3AMEBIDX%3AIT&var=541592006226&_trksid=p2055119.m1438.l2649]
Did you try it ?