Replacement Battery Pack with Controller for Dog H2O Cordless. 
Powered by 4 x "D" size battery (not included) 
Controller with 2 settings: 
Press the button once, filter will run for 2 minutes every 90 minutes.
Double Click the button for filter to run for 2 minutes every 45 minutes. 
Comes with 1 year warranty 
 
Note: If your Dog H2O Cordless contains a Micro USB socket, please use the Battery Pack with V2 Controller. Item number: R-DH025-BUSB