SPECIFICATIONS Material: Plastic Great for the home or kitchen, this water pump works for any water source or pairs perfectly with our mini fridge and filter system. This automatic water pump is a great gift for your family member who needs it by their bed or at the desktop. Power: 4W Voltage: 5V Power supply: electric Battery capacity: 1800mAh Shell material: stainless steel Operation mode: mechanical Timing function: not timing Power supply mode: Type-c