Stand mixer power 900 watt bowl capacity 39 litre speed level 7 functions kneading blending stirring whisking housing material plastic bowl material stainless steel colour white series bosch mum 5 bosch startline mixer attachments patisserie set features mixing bowl balloon whisk splashguard flat beater dough hooks motorfunktionen soft start electronic speed control pulse function characteristics planetary mixing action multifunction arm 3 connect