1. Product Overview
The CYCPLUS AS2pro is a compact and ultra-lightweight portable electric pump designed for inflating bicycle tires. It features a digital display for real-time pressure measurement, auto-stop functionality, and dual valve compatibility for both Presta and Schrader valves.

Figure 1.1: The AS2pro's compact, pocket-sized design (70.5mm x 28mm x 43.5mm).

Figure 1.2: The AS2pro is ultra-light, weighing only 120g, making it easy to carry.
Video 1.1: A comparison of CYCPLUS AS2 series pumps, demonstrating their compact size and inflation capabilities.
2. What's in the Box
The package includes the following items:
- Inflator x 1
- Presta Valve Converter x 1
- Silicone Case x 1
- Hose x 1
- Splash-proof Pouch x 1
- Seal Part x 1
- Cable x 1 (Type-C)
- Ball Needle x 1

Figure 2.1: All components included in the AS2pro package.
3. Getting Started
3.1 Initial Charging
Before first use, fully charge the inflator with a suitable Type-C charger. The screen's battery indicator light will illuminate and flash incrementally during charging. Once fully charged, all battery indicator lights will be illuminated. A full charge typically takes about 30 minutes.

Figure 3.1: Charging the AS2pro via its Type-C port. It reaches full charge in approximately 30 minutes.
3.2 Safety Warnings
- For TPU inner tubes with resin valves, always connect them with an extension air hose. Direct connection may cause the valves to melt due to overheating.
- The valve may become very hot immediately after inflation. Be careful not to burn your fingers.
- The inflator may get hot during operation. Use it with the provided silicone case for protection.
- It is normal to feel a sense of traction when pulling the inflator off a Presta valve after inflation.

Figure 3.2: Important safety warnings regarding high temperature nozzle and non-waterproof nature.
4. Operation
4.1 Part Identification
Familiarize yourself with the main components of the inflator:
- Type-C Charging Port: For charging the device.
- Nozzle: Connects to the tire valve.
- LED Screen: Displays pressure value, battery level, and pressure unit.
- Power Button: Long-press to power on/off, short-press to start/stop inflation.
- '+' and '-' Buttons: Adjust target pressure, switch pressure units (PSI/BAR).

Figure 4.1: Digital display showing pressure value, battery level, and pressure unit.
4.2 Connecting the Air Valve
The AS2pro supports both Presta and Schrader valves. The inflator is ready for Presta valve use out of the box. For Schrader valves, adjust the nozzle accordingly.
To connect directly:
- Adjust the nozzle mode (remove the pillar for Presta, install for Schrader).
- Connect the nozzle directly to the tire valve.
- Keep a tight grip on the nozzle while inflating.
To use with the hose (recommended for Schrader and above 100 PSI):
- Hold the hose and the suitable adapter (Presta or Schrader).
- Connect the adapter to the tire valve.
- Connect the hose to the inflator's nozzle.

Figure 4.2: Dual valve compatibility setup for Schrader and Presta valves.

Figure 4.3: Using the extended hose for tire inflation, especially recommended for TPU valves or high-pressure inflation.
4.3 Power On and Set Target Air Pressure
- Long-press the Power button to turn on the inflator. The screen will illuminate, displaying the real-time air pressure reading.
- Press the '+' and '-' buttons simultaneously to switch between PSI and BAR units.
- Use the '+' and '-' buttons to adjust your desired target pressure. The set pressure will display for 3 seconds before reverting to the current pressure display.
4.4 Inflating
Press the Power button to start inflation. The pump will automatically stop once the target air pressure is reached.

Figure 4.4: The auto-stop feature ensures precise inflation to the preset value.
4.5 Shut Down
Long-press the Power button to turn off the inflator. If the air pump is not started and there is no operation within 1 minute while it is powered on, the air pump will automatically shut down.
5. Performance
The AS2pro offers powerful and efficient inflation:
- Only 52 seconds to refill a 700*25C road bike tire from 0-80 PSI.
- Only 120 seconds to inflate a 700*25C road bike tire from 0-120 PSI.

Figure 5.1: Inflation performance of the AS2pro.
5.1 Battery Life
With improved efficiency, the AS2pro boasts a longer battery life, capable of handling larger tires and higher pressures. A full charge allows for refilling a 700*25C road bike tire 2-3 times.

Figure 5.2: Battery endurance for inflating 700C25 tires.
5.2 Inflation Times and Available Times (When Fully Charged)

Figure 5.3: Detailed inflation performance table for different tire types.
6. Maintenance
6.1 Cleaning and Storage
- Wipe the inflator with a soft, dry cloth. Do not use harsh chemicals or abrasive cleaners.
- Store the inflator in a cool, dry place, away from direct sunlight and extreme temperatures.
- Ensure the inflator is fully charged before long-term storage to maintain battery health.
6.2 Protection
The AS2pro comes with a silicone insulation case and a splash-proof pouch. Use the silicone case during operation to prevent burns from heat. The splash-proof pouch provides protection against rain and sweat, allowing for use in various outdoor conditions.

Figure 6.1: The splash-proof pouch protects the inflator from elements.
7. Troubleshooting
- Overheating/Valve Melting: If using with TPU inner tubes with resin valves, always use the extension air hose to prevent overheating and potential melting of the valve.
- Air Leakage: If you hear air leaking during inflation, adjust the position or angle of the inflator against the valve until the leakage stops. Ensure a tight grip.
- Traction when Removing from Presta Valve: It is normal to feel some resistance or 'traction' when pulling the inflator off a Presta valve after inflation.
- Automatic Shut-off: The inflator will automatically shut down if it's powered on but not inflating, and no operation is performed within 1 minute. This is a normal power-saving feature.
8. Specifications
| Feature | Specification |
|---|---|
| Size | 70.5mm x 28mm x 43.5mm (70*49*28mm as per manual) |
| Weight | 120g |
| Material | Aluminum |
| Battery | 420mAh 7.4V 3.11Wh |
| Charging Port | Type-C 5V 1.5A |
| Current | 2.5~7.5A |
| Max Pressure | 120 PSI |
| Digital Display | Yes |
| Origin | Mainland China |
| Certification | CE |
8.1 AS2 Series Comparison

Figure 8.1: Comparison of AS2, AS2 Pro, and AS2 Pro Max models.
9. User Tips
- Noise Level: The pump operates with some noise, which is typical for devices of this type.
- Initial Charge: It's common for the pump to arrive partially or fully charged, but always ensure a full charge before first use for optimal performance.
- Presta Valve Usage: For Presta valves, you generally do not need the long extension hose unless inflating to very high pressures or using TPU valves.
- Portability: Its compact size and light weight make it very convenient to carry in a pocket or small bag.
- Tire Capacity: The pump is capable of inflating larger tires (e.g., 29x2.6) multiple times on a single charge.
10. Warranty and Support
Manufacturer: Chengdu Chendian Intelligent Technology Co., Ltd
Address: No.88 Tianchen Road, Chengdu, Sichuan Province, China
Warranty: Free repair or replacement within one year after purchase.
After-sales email: steven@cycplus.com
For more detailed instructions and information, please refer to the complete user manual available in PDF format: CYCPLUS AS2pro User Manual (PDF)