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Contact pressure adjustment: The contact pressure can be manually adjusted to various settings. The advantages are clear: no risk of burn-in effects on sensitive floors; reduced motor power consumption – for longer battery operation; less brush or pad wear. Intelligent keys: the KIK system (°­Ã¤°ù³¦³ó±ð°ù Intelligent Key) Two keys, two colors: gray for supervisors or programmers and yellow for operators. Access rights for the yellow key can be granted with the gray key and settings such as driving speed, brush speed, opera­ting language (16 to choose from) can all be programmed, assisting in reducing operating errors. eco!efficiency mode extends the battery operating time by up to 30%. The reduction in the power of the suction turbine and brush motors is only minimal. On smooth floors in particular, a lower turbine power is normally adequate for achieving perfect results. In eco!efficiency mode, sound is also decreased to 61 dB(A) (when using the D65 head), perfect for low noise environments, such as hospitals and schools. Tank rinsing (optional accessory) The B 60 W can also be provided with an integrated tank rinsing system. The dirty water tank can be cleaned via a nozzle system.