1. Product Overview
The FLEXTAILGEAR Max Pump 2 Pro is a versatile, ultra-light, and portable air pump designed for various inflatable products. It integrates multiple functions including inflation, deflation, an LED camping light, and an emergency power supply.

Figure 1: FLEXTAILGEAR Max Pump 2 Pro and included accessories.
Key Features:
- Powerful In/Deflation: Two pressure levels (2.5kPa/150 L/MIN and 4.5kPa/300 L/MIN).
- Integrated LED Light: Steplessly adjustable camping light (50-500 lumens).
- Emergency Power Supply: 3600 mAh rechargeable battery with Type-C charging port, can charge USB-powered devices.
- Ultra-Light & Portable: Weighs 5.64oz, compact dimensions (3.03"L x 2.26"W x 2.02"H).
- 5 Nozzles: Suitable for most small to large inflatable products.
- Water-resistant: IP55 rating for protection against rain and splashes.
2. Package Contents
Upon unboxing, please ensure all items are present:
- FLEXTAILGEAR Max Pump 2 Pro unit
- 5 different air nozzles
- USB Type-C charging cable
- Storage bag

Figure 2: Exploded view of the Max Pump 2 Pro showing internal components and ports.
3. Setup and Charging
3.1 Initial Charge
Before first use, fully charge the Max Pump 2 Pro. The device features a 3600 mAh rechargeable battery.
- Open the protective cover on the side to reveal the Type-C charging port.
- Connect the provided USB Type-C cable to the pump and a power source (power bank, laptop, car charger, or power adapter).
- The charging indicator light will be red during charging (0-99%) and turn green when fully charged (100%).

Figure 3: Charging status indicators.
3.2 Attaching Nozzles
Select the appropriate nozzle for your inflatable product. The pump comes with 5 different nozzles to fit various valve sizes.

Figure 4: Assortment of 5 air nozzles.
To attach, firmly insert the chosen nozzle into the desired port (inflation or deflation) on the pump.
4. Operating Instructions
4.1 Inflation
- Select the correct nozzle and attach it to the inflation port (side outlet) of the pump.
- Insert the nozzle into the valve of your inflatable product.
- Double-click the power button to turn on the pump.
- Long-press the power button to switch between Low-Pressure mode (2.5kPa) and High-Pressure mode (4.5kPa).
- Once inflated, single-click the power button to turn off the pump.

Figure 5: Inflation process for a sleeping pad.
4.2 Deflation
- Select the correct nozzle and attach it to the deflation port (top inlet) of the pump.
- Insert the nozzle into the valve of your inflatable product.
- Double-click the power button to turn on the pump.
- The pump will now suck air out of the product.
- Once deflated, single-click the power button to turn off the pump.

Figure 6: Deflation process for a vacuum bag.
4.3 LED Camping Light
- Double-click the light button to turn on the LED light.
- Long-press the light button to steplessly adjust the brightness (50-500 lumens).
- Single-click the light button to turn off the light.

Figure 7: LED camping light with adjustable brightness.
4.4 Emergency Power Supply
The Max Pump 2 Pro can function as an emergency power bank for USB-powered devices.
- Open the protective cover on the side to reveal the USB Type-A output port.
- Connect your device's charging cable to the USB output port on the pump.
- The pump's battery can charge a phone once or twice depending on the phone's battery capacity.

Figure 8: Using the pump as an emergency power supply.
4.5 Fire-Blowing Function
Utilize the pump's air-blow function to assist in starting or maintaining a campfire.
- Attach a suitable nozzle to the inflation port.
- Double-click the power button to activate the pump.
- Direct the airflow towards the fire to provide oxygen.
Video 1: Official product video demonstrating various features including inflation, deflation, and fire-blowing.
5. Maintenance and Important Notes
5.1 Battery Maintenance
To maintain optimal battery activity and lifespan, recharge the battery at least once a month, even if not in use.
5.2 Water Resistance
The Max Pump 2 Pro features an IP55 water resistance rating, providing protection against rain, sweat, and water splashes. However, it is not fully waterproof. Discontinue use immediately if it comes into contact with water to prevent damage.

Figure 9: IP55 water resistance for protection against splashes.
5.3 Usage Restrictions
Please observe the following restrictions to ensure safe and proper operation:
- Do not use continuously for more than 10 minutes. Allow the device to cool down before resuming use.
- Not suitable for inflating basketballs, footballs, balloons, or vehicle tires.

Figure 10: Important usage advice and restrictions.
6. Troubleshooting
If you encounter issues with your Max Pump 2 Pro, please consider the following:
- Pump not turning on: Ensure the battery is charged. Double-click the power button firmly.
- Weak airflow: Check if the correct nozzle is securely attached. Ensure the pump is in High-Pressure mode if more power is needed.
- Charging issues: Verify the USB Type-C cable is properly connected to both the pump and the power source. Check the charging indicator light.
- Overheating: If the pump feels warm, discontinue use and allow it to cool down for at least 10 minutes. Avoid continuous operation beyond 10 minutes.
7. Specifications
| Attribute | Value |
|---|---|
| Brand | FLEXTAILGEAR |
| Model Number | HU-XI-135 |
| Color | Black |
| Material | Acrylonitrile Butadiene Styrene |
| Item Weight | 5.6 Ounces |
| Product Dimensions | 3.03"L x 2.26"W x 2.02"H |
| Power Source | Battery Powered |
| Air Flow Capacity | 300 Liters Per Minute |
| Maximum Pressure | 4.5 Kilopascal |
| Operation Mode | Automatic |
| Battery Capacity | 3600 mAh |
| Water Resistance | IP55 |
8. Warranty and Support
For warranty information or technical support, please refer to the product packaging or contact FLEXTAILGEAR customer service directly. Keep your purchase receipt for warranty claims.
