Pet Water Fountain Oneisall PW04 — 3.5 L Capacity, Continuous Flow

Oneisall PW04 is a 3.5 L cordless pet fountain designed to provide cats with continuous access to fresh, filtered water. The unit combines a stainless steel bowl with a large reservoir and a transparent viewing window for easy water level checks. Its wireless design allows flexible placement around the home and reduces the risk of pets chewing cords.

Advantages

The fountain uses 304 stainless steel and ABS components for improved hygiene and durability compared with typical plastic drinkers. A 5000 mAh battery supports up to 60 days of operation on a single charge, and the DC 5V/1A energy-efficient design minimizes power use. An ultra-quiet pump keeps noise below 30 dB, while an activated carbon filtration stage removes hair, dust and other impurities to improve water taste and quality.

Suitable for

• Single-cat households
• Homes with multiple cats
• Owners who need a low-maintenance water solution
• Places where a cordless fountain is preferred (living room, balcony, garden)

Key specifications

• Capacity: 3.5 litres
• Materials: 304 stainless steel and ABS
• Battery capacity: 5000 mAh
• Rated voltage: DC 5V / 1A
• Charging port: USB-C
• Working time on a single charge: up to 60 days
• Noise level: approximately 30 dB
• Approximate weight: 0.95 kg
• Approximate dimensions: 20 x 20 x 5 cm

How to use

Fill the reservoir with potable water and place the fountain on a stable, level surface. Select one of the three operating modes—Sensor (dispenses when a cat approaches within about 1 metre), Intermittent (dispenses 30 seconds every 30 minutes) or Constant (continuous flow while connected to power)—according to your pet’s habits. Charge the unit via the USB-C port before first use and recharge as needed. Clean the stainless steel bowl and filters regularly by hand or in the dishwasher where applicable, and replace the activated carbon filter according to the manufacturer’s guidance to maintain water quality.

Usage recommendations

To maintain hygiene and pump performance, rinse the reservoir and clean the filter at least once a week. Use fresh tap or filtered water and check the transparent window periodically to ensure the water level remains sufficient for your pet.