Coffee Machine 2 Group. Features 2 group, Volumetric, AISI 304 commercial grade brushed stainless steel, Frothing ability: 3lt with 20 second recovery, Temperature stability: dual boiler probe system provides superior safety and greater thermal stability, Cup warmer: large cup warming station above unit, Water/steam: fully flexible stainless steam and water arms, Boiler refill: automatic boiler refill plus safety cut out to prevent damage, 11lt boiler, Specsheet