SPECIFICATION -Item Dimension: 5.2*10.2*9.1in -Transformer material: smart chip -Output power: max 800W -Output voltage: 12V 24V -Input voltage: AC 176-264V Instructions: Attach the red clip to the positive terminal and the black clip to the negative terminal (ensure proper connections with protection and alarms). Select the normal battery charging mode for lead-acid batteries before connecting the power. Notes: The maximum voltage limit is 35.0V. If this voltage is reached in either dry or wet mode, the charger will automatically shut down and restart charging only when the AC is disconnected or if the battery voltage falls below 24V. do not use other modes when charging the power off bottle to prevent different voltage values from damaging the power off bottle