If u get those 4channel type..means can dose 4 different liquid. You set the ml. Some can set less than one ml. Example u need to dose 120ml in a day...u set 120 and freqyency 4 time..it will set auto the amount at 30ml x4 in a 24hr day. The time for the dose starts u set. Some doser do not allow multiple dosing at same time eg like 0905, 1005, 1105..etc to prevent mix of the dosing liquid. If ur food liquid need to be fridge, then manually dose instead of using doser.
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