Electronic dual flush button VOLA RS83E. Can be installed in walls of various thicknesses using extensions. Sensor range up to 10 cm. Compatible with Geberit cisterns: Sigma UP320, Geberit power supply (115.861.00.6) and Geberit lifting device for large and small flushes with motor and control unit (115.862.00.6). Omega 82/98, Geberit power supply (115.861.00.6) and Geberit lifting device for large and small flushes with motor and control unit (115.955.00.6). Note: Not suitable for the Australian market. External flange diameter: 60 mm. Required wall hole diameter: 54 mm. ADA approved