AC/DC Rechargeable Air Pump

🌊SOBO SB‑4000 Mini Rechargeable AC/DC Air Pump – Compact & Quiet Backup Aerator

Overview

The SOBO SB‑4000 (sometimes labeled SB‑400) is a compact, rechargeable dual-outlet air pump designed for small to medium aquariums. It combines powerful airflow, whisper-quiet operation, and a built-in lithium battery—ensuring continuous aeration even during load shedding or while off-grid.

🎯 Key Features

• Double Outlet Design: Delivers 2×3 L/min airflow—ideal for powering two air stones or devices simultaneously.

• Built‑in Lithium Battery: USB-rechargeable battery provides up to 12 hrs of runtime on full power and up to 25 hrs in power-saving mode.

• Super‑Silent Operation: Engineered for quiet performance — ideal for use in living rooms or during the night .

• Energy-Efficient: Consumes only 2.8 W, balancing strong airflow with low electricity usage

• Auto Power Switch & Charging: Automatically switches to AC when plugged in and stops charging when full; seamlessly switches to battery during outages

• USB Charging: Handy USB rechargeability allows flexible charging via power banks or adapters.

💡 Ideal For

• Small to medium freshwater or saltwater aquariums

• Backup aeration during load shedding or power failures

• Quiet spaces—living rooms, bedrooms, offices

• Portable setups—travel tanks, outdoor displays, or emergency aeration

📦 Specifications

🔧 In the Box

• 1 × SOBO SB‑4000 Mini Air Pump

• 2 × air stones

• 2 × air hoses

• USB charging cable

🐟 Use Cases

• Keeps fish oxygenated for hours during outages–great for load shedding

• Runs dual air stones in planted or display tanks

• Quiet companion for night-time setups in bedrooms or offices

• Portable aerator for camping, travel, or temporary fish setups

✅ Why Choose the SB‑4000?

• Reliable dual airflow to aerate two devices at once

• Long-lasting battery backup for up to 25 hrs

• Whisper-quiet operation suitable for any room

• Compact and portable, with energy-efficient performance

• Smart auto-switching & USB charge, ready whenever needed