Introduction
Thank you for purchasing the Kaedear KDR-AP3 Mobile Compressor. This rechargeable electric air pump is designed for convenient and precise air pressure adjustment for various items, including vehicle tires and sports equipment. It can inflate a 16-inch bicycle tire approximately 1.5 times, a motorcycle tire approximately 5 times (in about 3.5 minutes), and a ball approximately 60 times (in about 30 seconds). Please read this manual thoroughly before use to ensure safe and optimal operation.
Product Overview and Package Contents
The Kaedear KDR-AP3 is a compact and powerful electric air pump. The package includes the main unit and various accessories to suit different inflation needs.

Image: Kaedear KDR-AP3 Mobile Compressor and included accessories.
Package Contents:
- Main Unit (Mobile Compressor)
- Air Hose (30cm x 1, 15cm x 1) - American valve type
- USB Charging Cable (Type-C)
- Ball Needle
- French Valve Adapter
- English Valve Adapter
- Float Nozzle
- Storage Bag
Specifications
| Feature | Specification |
|---|---|
| Cylinder Count | 1 cylinder |
| Rotation Speed | 15000 RPM |
| Displacement | 3.4 CC (15-18 L/min) |
| Max Output Pressure | 150 PSI |
| Battery Capacity | Dual Battery 2000mAh/7.4V (Total 4000mAh/14.8Wh) |
| Battery Operation Time | 15-20 minutes |
| Operating Current | 1.6-5A (No load 1.6A, Load above 40PSI 3.5-5A) |
| Charging Input | 5V2A / Type-C |
| Charging Time | 2-3 hours |
| Pressure Units | PSI, BAR, KPA, Kg/cm² |
| Max Pressure Limit | 999 KPA |
| Motor Life | 700 hours |
| LED Power | 1W |
| Protection Features | Motor temperature protection (65°C), Motor stall overcurrent protection (8A), Battery overcurrent protection (10A), Battery overcharge protection (8.4V), Battery over-discharge protection (6V) |
| Dimensions | Length 152mm, Width 68mm, Thickness 46mm |
| Weight | 442g |
| Operating Temperature | -10°C to 45°C |
| Continuous Operation Time | Within 10 minutes |
Safety Precautions
- When operating, the device generates approximately 85dB of sound. This may resonate depending on the environment and may be perceived as loud.
- This product compresses and discharges air, causing it to become hot during operation. This is normal. Avoid prolonged continuous use. Do not touch hot parts such as the hose directly after use.
- If the hose is not properly attached, or if foreign objects are inside the hose, it may cause malfunction. If you experience malfunction, abnormality, or discomfort, press and hold the '+' and '-' buttons simultaneously for 5 seconds or more to reset the unit. This may resolve the issue.
Setup
1. Charging the Device
The device can be charged using the included USB Type-C cable via the Type-C port located on the top side of the unit. The indicator light will flash during charging and illuminate steadily when charging is complete. The device cannot be used while charging.
Video: This comprehensive video demonstrates various aspects of the Kaedear KDR-AP3 mobile compressor. It covers the charging method and battery level indicators (0:08-0:25), how to connect the air hose and different adapters (0:25-0:53), an explanation of all button functions and display information (0:53-2:29), the use of the USB Type-A charging function (2:29-2:41), and step-by-step inflation procedures for both motorcycle (2:41-3:17) and bicycle tires (3:17-3:48).
Battery Level Indicator:
- Green: 70% - 100%
- Yellow: 30% - 70%
- Red: 5% - 30%
- Flashing Red: Below 5%
2. Connecting the Air Hose and Adapters
Connect the air hose to the device by turning it clockwise to tighten and counter-clockwise to loosen. Select the appropriate adapter for your item and screw it onto the tip of the air hose.
Adapter Usage:
- American Valve (US Style Valve) for Cars/Motorcycles: Turn clockwise to depress the valve core and measure air pressure. When removed, the valve core returns, preventing air leakage.
- English Valve Adapter for Bicycles: Inflates unidirectionally. Air pressure cannot be measured. Inflate until the set pressure is reached and the pump stops automatically.
- French Valve Adapter for Road Bikes: Loosen the valve core to allow air to pass through for inflation. After inflation, immediately tighten the valve core before removing the hose.
- Ball Needle: For inflating sports balls.
- Float Nozzle: For inflating inflatable floats and toys.

Image: Illustrates various valve types (US style, English, French, Ball Needle, Float Nozzle) and their corresponding pressure adjustment ranges for different applications like cars, motorcycles, bicycles, road bikes, and balls.
Operating Instructions
1. Button Functions and Display Explanation
The device features six buttons for easy operation. Refer to the diagram below for button identification and display information.

Image: The digital display of the Kaedear KDR-AP3, showing measured air pressure, pressure unit, set air pressure, battery level, and current mode.
- Power Button: Press and hold for 3 seconds to power on/off. When powered on, press once to start inflation, press again to stop.
- '+' Button: Increases the set air pressure. Long press for fast adjustment.
- '-' Button: Decreases the set air pressure. Long press for fast adjustment.
- LED Light Button: Press to cycle through LED light modes (constant on, strong flash, SOS warning).
- Unit Switch Button ('U'): Toggles between pressure units (PSI, BAR, KPA, Kg/cm²).
- Mode Switch Button: Cycles through preset inflation modes:
- Car Mode: Recommended 200-250 kPa (35 PSI)
- Motorcycle Mode: Recommended 200-290 kPa (40 PSI)
- Bicycle Mode: Recommended 2.0-9.0 bar (38 PSI)
- Ball Mode: Recommended 0.7-0.9 bar (8 PSI)
- Custom Mode: Allows setting pressure beyond the upper limits of other modes.
- Reset Function: To reset the unit, press and hold the '+' and '-' buttons simultaneously for 3 seconds.
2. Inflation Procedure (Motorcycle Example)
- Remove the cap from the tire valve.
- Connect the air hose (with appropriate adapter if needed) to the tire valve. The KDR-AP3's air hose is American valve compatible, so no adapter is needed for American valves.
- Select "Motorcycle Mode" using the Mode Switch Button. Adjust the target air pressure using the '+' and '-' buttons to the recommended value for your motorcycle.
- Press the Power Button to start inflation. The pump will automatically stop when the target pressure is reached.
- Remove the air hose from the tire valve and replace the valve cap.
3. Inflation Procedure (Bicycle Example)
- Attach the English valve adapter to the air hose.
- Connect the air hose with the adapter to the bicycle tire valve.
- Select "Bicycle Mode" using the Mode Switch Button. Adjust the target air pressure using the '+' and '-' buttons to the recommended value for your bicycle.
- Press the Power Button to start inflation. The pump will automatically stop when the target pressure is reached.
- Remove the air hose from the tire valve and replace the valve cap.
Additional Features
1. USB Type-A Charging Function
The KDR-AP3 is equipped with a USB Type-A output port (5V2A) on its top side, allowing you to use it as a power bank to charge electronic devices such as smartphones.

Image: The Kaedear KDR-AP3 unit charging a smartphone via its USB port, illustrating its power bank capability. The image also highlights the integrated LED light for illumination.
Maintenance
To ensure the longevity and optimal performance of your Kaedear KDR-AP3, follow these maintenance guidelines:
- Keep the device clean and free from dust and debris. Wipe with a soft, dry cloth.
- Store the device in a cool, dry place away from direct sunlight and extreme temperatures.
- Ensure all adapters and the air hose are clean before and after use.
- Charge the device regularly, even if not in frequent use, to maintain battery health.
Troubleshooting
If you encounter issues with your KDR-AP3, please refer to the following common solutions:
- Device not turning on: Ensure the battery is charged. If the battery is low, charge the device.
- Air leakage during inflation: Check that the air hose and adapters are securely tightened. Ensure the correct adapter is used for the valve type. For French valves, ensure the valve core is loosened before inflation and tightened afterwards.
- Malfunction or abnormal behavior: Perform a reset by pressing and holding the '+' and '-' buttons simultaneously for 3 seconds. If the issue persists, contact customer support.
- Slow inflation: Ensure the air hose is not kinked or obstructed. Check that the battery has sufficient charge.
Warranty and Support
Manufacturer's Warranty Period: 1 year from the date of purchase.
Kaedear is committed to customer satisfaction and provides support even after purchase. For any questions about the product or installation advice for motorcycles, our staff with national maintenance qualifications can provide accurate and expert assistance.
In the unlikely event that a product defect is diagnosed, we will review it based on our manufacturer's warranty policy and provide free repair or replacement under the manufacturer's warranty. For commercial use, the manufacturer's warranty period will be halved (e.g., if the manufacturer's warranty period is 1 year, it will be 6 months, expiring on the same date 6 months after the purchase date). Please refer to the manufacturer's warranty policy on our official website for details.
We will provide support even after installation and use. As a Japanese manufacturer, we will respond with a spirit of hospitality. Please feel free to contact us first.
Online Manual Access
In our commitment to reducing environmental impact and promoting decarbonization, we refrain from enclosing paper manuals. The instruction manual can be viewed or downloaded from the product page on the official Kaedear website.
Steps to View/Download:
- Scan the QR code or access the official website: https://www.kaedear.com/
- Search for the product name or model number from the icon on the top right of the official website.
- Scroll down the product page and click the "Download Instruction Manual" button located above the cart box.

Image: Visual guide for accessing and downloading the online instruction manual from the Kaedear official website, including a QR code and screenshots of the website interface.





