Jebao Programmable Auto Dosing Pump DP-4 Model :DP-4, Idea for Dosing CA / MG / AB Water or other liquid 4 Channel Dosing Pump Each Channel Provides 1 to 9999ml per day,24 timer per day Can interval 30 days to dosing, Easy Set different time of the Dosing Pump Q max (L/m): 70, Dimension: 9.25" x 5.11" x 2.55" NOTE: User manual and user guide attached in this page - kindly refer it