4.4.2. Modes of operation4.4.2.1. „MODE“ and „APPLICATOR“ keys• Pressing one of the 9 keys (S402 to 404, 406 to 408, 410 to 412) activates the assigned LED.4.4.2.2. „+“ and „-“ keys, „MINUTES“ indicator• A short actuation of the „+“ key (S405) increments the treatment time indicator „MINUTES“by 1 (end value 30).• Continuous actuation of the „+“ key increases the indicated time in steps of 5 digits (e. g. 5, 10,15, etc. - end value 30).• The actuation of the „-“ key (S401) has the similar effect but the time indicated is reset (endvalue 0).• Simultaneous actuation of both keys results in the indication of „0“
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