The INTALIM downlight module operates on the Casambi Bluetooth 4.0 mesh network, with a free app available on IOS and Android. The Intalim is designed to fit a 4? (99mm) heatsink and has a 2.8?(71mm) LES compatible with most common optical systems. features include direct AC on-board, dedicated emergency circuit and integrated Casambi Bluetooth dimming interface.