Source CASAMBI enabled wall switch with battery on m.alibaba.com
Casambi - The FELA SWITCH range (either as a 230 V or battery operated version) are Casambi Ready touch-display switches that come with a hygienic glass covering. Each FELA SWITCH can be
Casambi Line Battery Remote (Xpress)
Self Powered Single Rocker Wireless Switch - Casambi