... different price in different quantity from 1 set.Dual-channel syringe pump:Automatic calibration,Openable slider ... medical syringe pump with CE mark : SPECIFICATION (Dual Channel Syringe Pump)Syringes10, 20, 30, 50 mL ... channel, over 4 hours for dual channel when battery is recharged for 12 hours, at flow rate ... battery: over 4 hours for dual channel when battery is recharged for 12 hours, at flow rate ...