... pump BT300M Flow rates:0.007~1140mL/min Speed:0.1 to 300 rpm, reversible Speed precision:0.1 rpm Product IntroductionThis product ... the external controller interface, with three available modes: 0-5V, 0-10V and 4-20mA. Memory function is also available ... when used in the open air SpecificationsSpeed0.1 to 300 rpm, reversibleSpeed precision0.1rpmSpeed controlRotary encoded switch / full speedDisplay3- ...