YHWSHINE 29V2A Power Supply for Okin Power Recliner or Lift Chair Power Supply Replacement Transformer Kit Fully Compatible with OKIN, Limoss and Tranquil Ease Lift Chair,Cheers electric sofa and Power Recline DeltaDrive and BetaDrive Motors with a two pin (flat & round) connection to the motor. Battery Back Up 9V, Battery is not included. 29V 2A transformer with battery backup, motor cable and AC power cord Fully Compatible with OKIN, Limoss and Tranquil Ease Lift Chair,Cheers electric sofa and Power Recline DeltaDrive and BetaDrive Motors with a two pin (flat & round) connection to the motor. In the absence of electricity can use two 9V battery resetThe battery needs to be purchased on its own