We are the exclusive agent of German AAT stair climbers in Hong Kong. All AAT stair climbers sold on Wheelchair King are provided with original parts supply and authorized maintenance. You can buy with more confidence that they are not inferior/fake goods of unknown origin.
![The Wheelchair King logo has a blue background with white "AAT" text on the left. On the right side are Chinese characters and the WheelChair.com.hk website, highlighting the German brand AAT CARGOMASTER C120 [Pole-Type Cargo Stairlift], which represents Hong Kong wheelchairs.](https://www.wheelchair.com.hk/wp-content/uploads/2022/04/10-1024x287.jpg)
CargoMaster C400 - Efficient and safe transport of heavy loads
The CargoMaster C400 is able to safely transport loads weighing up to 400 kg indoors and outdoors, on stairs and on flat ground. Normally, transporting such heavy loads requires several people and often results in back problems and downtime due to the effort required. With the C400, one person can complete these tasks efficiently and safely.
The C400 features an electrically adjustable lift function that optimizes the load's center of gravity, making it easier to transport over stairs and flat surfaces. An integrated lift also makes loading and unloading vehicles or racks easy. Not only does this help reduce physical stress, it also promotes long-term employee health and satisfaction.
CargoMaster C400 – Electric stair climber + lift truck
Infinitely adjustable speed and two user-friendly climbing modes provide flexible usage options:
Continuous climbing mode:In this mode, the C400 climbs the stairs continuously in one go. This makes stair climbing quick and efficient.
Single-step mode:At the touch of a button, the CargoMaster switches to single-stage mode, stopping briefly after each stage. It will only continue if the user presses the up or down switch again. This mode is ideal for beginners or when particularly precise control is required on narrow stairs or with sensitive loads.
The ergonomically designed, fully adjustable handle can be individually adjusted to the height of the user or the size of the goods to be transported, further simplifying transport and increasing comfort.
CargoMaster C400
When you need to move goods up and down stairs quickly, safely and easily, the C400 is your trusted partner. With a load capacity of up to 400 kg, it can easily transport very heavy and bulky equipment to its destination. Whether as a stair climber or a lift, the CargoMaster can be used as a transport aid across steps and on flat ground. The powerful electric drive is powered by a high-performance battery that can be charged via a power adapter.
- Load capacity: 400 kg
- Steps per minute: 3 – 7
- Floors per charge*: ~ 10
*Maximum load during stair operation is 400 kg. With an average load of about 75 kilograms, the battery can travel about 20 floors on a single charge. Please refer to the user manual for more details.


![[Wheelchair King] With the help of a sturdy German AAT Cargomaster C400, a man uses a handcart to lift a large white appliance up the outdoor steps and deliver it to the building. Nearby, a delivery van was waiting. .](https://www.wheelchair.com.hk/wp-content/uploads/2025/02/elektrische-treppenhubkarre-c400-transport-getraenkeautomat-neu-2443a3bf.webp)
![[Wheelchair King] A man effortlessly uses the German-made AAT Cargomaster C400 (designed to carry loads of up to 400 kilograms) to maneuver a large white device with colorful buttons into a truck parked outside a yellow building. Special electric stair climbing machine ensures smooth transportation. .](https://www.wheelchair.com.hk/wp-content/uploads/2025/02/C400_Anwend_Ebene-rgb-bec75f0e.webp)
![[Wheelchair King] A man uses a stair-climbing trolley to load a large white appliance secured with green straps into the back of a grey truck, a German-made AAT Cargomaster C400, parked outside a building. .](https://www.wheelchair.com.hk/wp-content/uploads/2025/02/elektrische-Treppenhubkarre-CargoMaster-C400-liftfunktion-0fbc0d38-%E6%8B%B7%E8%B2%9D.webp)
Ready to meet any challenge in any application
Automatic safety brakes stop the device at each edge of the staircase, ensuring maximum safety. The powerful battery can operate for 10 to 20 floors, depending on the load, and can be quickly recharged via the mains charger.
The scope of delivery includes the CargoMaster C400 with integrated lift, strapping, battery pack and charger. Additional accessories make the C400 even more flexible, enabling it to be optimally utilized in a variety of transport applications.
C400 is the ideal partner for many industries and applications:
- vending machine
- Car Transportation
- Switchgear structure
- Slot machine
- Heating Engineer
- Stove Builder
- … and more!

Extremely safe, stepped edge braking system on each wheel
Convincing advantages
The C400 series of stair climbers sets new standards in terms of user comfort and operability. Thanks to proven technologies such as the multi-level battery display, they offer optimal user comfort and reliable performance in everyday use.
solid rubber tires
Solid rubber tires make the CargoMaster puncture-proof – even when the wheels are continuously subjected to heavy loads. There are a variety of pneumatic tires to choose from.
Flexible use
Whether indoors or outdoors, whether straight or spiral stairs – CargoMaster is a strong partner in any environment.
Adjustment of center of gravity
The C400 is equipped with a height-adjustable bucket, which allows easy adjustment of the load's center of gravity, making the transport of heavy goods more stable and safer.
Please first communicate with the platform that is suitable for your product

CargoMaster C400 Technical Data
Item | Details |
---|---|
maximum. Lifting capacity | 400 kg |
Step edge braking system for each wheel | ✓ |
single step mode | ✓ |
Climb rate per minute(1) | Steps 3 – 7 |
Range after one battery charge (Ø 75 kg) (1) | About 20 floors |
Range after one battery charge (Ø 350 kg) (1) | About 10 floors |
DC motor | 24V/275W |
Standard battery(2) | 2x 12V/5Ah |
Width/Depth (mm) | 1509-1869 / 566/790 |
Battery weight | 4.1 kg |
Total weight includes battery | 86.1 kg |
(1) Climb rate and range may decrease as weight increases. The range is determined by pure upstairs mode.
Frequently Asked Questions (FAQ):
What is the maximum load capacity of the CargoMaster C400?
The CargoMaster C400 can transport loads of up to 400 kg both up and down stairs. This high load capacity makes it ideal for particularly heavy and bulky objects that need to be moved safely and efficiently, such as machinery and large appliances.
How do the CargoMaster C400's electrically adjustable forks support transport?
The C400's electrically adjustable load forks can be lowered or raised to optimally adjust the center of gravity for the transported load. This flexible adjustment facilitates maneuvering on stairs and flat ground and ensures better stability during the entire transport process.
What safety features does the CargoMaster C400 offer?
The CargoMaster C400 has safety features such as a safety brake system that enables controlled deceleration and prevents the load from sliding off in an uncontrolled manner. This feature provides additional safety for the operator and the transported goods.
Why is the CargoMaster C400 particularly suitable for industrial use?
Thanks to its high load capacity and flexibly adjustable load forks, the C400 is ideally suited for industrial applications where heavy loads need to be regularly transported up and down stairs. It is particularly suitable for warehouses, workshops and construction sites where different loads need to be transported safely and efficiently.
Do you provide training on using CargoMaster?
Yes, we deliver the stair climber with comprehensive instructions on the operation of the CargoMaster C400. This training covers all necessary safety precautions, efficient driving, and proper battery charging. Our experienced staff is always available to answer any questions you may have.
![[Wheelchair King] A Dual Climber [2-in-1 wheelchair stair climber] is placed near the marked path at the bottom of the stairs, highlighting the challenges of accessibility. .](https://www.wheelchair.com.hk/wp-content/uploads/2025/02/718e3e7c-7ed7-4039-94db-a3d3e657c637.webp)
We simulate tests in real stair environments and verify the performance of stair climbers to ensure they are perfectly matched to different usage scenarios. From home to commercial use, rigorous verification gives you peace of mind!
All pictures.dataand informationFor reference only, the actual product shall prevail.
[Wheelchair King] Barrier-free product showroom


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Wheelchair King has ten unique stair machines with complete functions.
Flexible to adapt to various environments and needs.

Crawler stair machine

Wheelchair-adjustable crawler stair climber

Electric escape chair

Entry-level crawler

Manual escape chair

2 in 1 stair climber

170kg cargo stair climber

400kg cargo stair climber

High-end pole-type stair climber

Entry-level pole stair climber
![[Wheelchair King] Blue and white decorative graphics with a shield logo containing the letter "P". The Chinese characters below are translated as "Wheelchair King, professional recommended products - Wheelchair King's carefully selected products".](https://www.wheelchair.com.hk/wp-content/uploads/2024/09/grand_wheelchair.jpg)
![[Wheelchair King] 3D illustration showing the teamwork displayed by healthcare professionals including doctors and nurses assisting a patient in a wheelchair in a well-equipped ward. Foreign text appears above the scene.](https://www.wheelchair.com.hk/wp-content/uploads/2024/09/teamwork.jpg)


The following is a sharing of customers’ personal experiences:
There was a customer who did not know anything about stair machines and purchased an electric stair machine online to use for his mother to go up and down the stairs. Unfortunately a serious accident occurred. When the customer was operating the stairlift to help his mother go down the stairs, the machine suddenly lost control, causing both the man and the stairlift to roll down the stairs.

As a result of the accident, the elderly man suffered multiple fractures and required multiple surgeries and a long time to recover.
When we choose an electric stair lift, we must consider the hardware andsoftware factors, andwhetherLicensed goods,Authorized agentAndtraining staff, you can buy with confidence.
Wheelchair King Exclusive Agency Authorization Letter
