1. Introduction
The Teffim Portable Tire Inflator, Model CQB-3686, is a versatile and compact air compressor designed for convenient inflation of various items. It features a digital pressure gauge, a maximum pressure of 150 PSI, an integrated LED light, and the ability to function as a power bank. This manual provides essential information for safe and effective use of your device.
This device is suitable for inflating tires on cars, motorcycles, electric bikes, and bicycles, as well as various sports balls and other inflatables.
2. Product Overview & Components
The Teffim Portable Tire Inflator is engineered for ease of use and portability, offering multiple functionalities beyond simple inflation.

Figure 1: Teffim Portable Tire Inflator and included accessories.
Key Features:
- Digital Pressure Gauge: Provides accurate real-time pressure readings.
- High Pressure Capability: Up to 150 PSI for various inflation needs.
- Portable & Cordless Design: Allows inflation anytime, anywhere without external power.
- Integrated LED Light: For illumination in low-light conditions.
- Power Bank Function: USB-A output port for charging external devices.
- Multiple Inflation Modes: Pre-set modes for cars, motorcycles, bicycles, and balls.
Included Components:
- Teffim Portable Tire Inflator (Main Unit)
- Air Hose with Presta/Schrader valve adapter
- Needle valve adapter (for balls)
- Tapered nozzle adapter (for inflatables)
- USB-C Charging Cable
- Storage Pouch
3. Setup & Charging
Initial Charging:
Before first use, fully charge the tire inflator. Connect the provided USB-C charging cable to the USB-C input port on the device and to a compatible USB power source (e.g., wall adapter, car charger). The digital display will indicate charging status.

Figure 2: Charging the inflator and using its power bank function.
4. Operating Instructions
The Teffim Portable Tire Inflator offers a straightforward 4-step process for inflation.

Figure 3: Visual guide for the 4-step inflation process.
Inflation Steps:
- Attach to the Valve: Screw the air hose onto the tire valve stem. Ensure a secure connection to prevent air leakage.
- Select Mode: Power on the device. Press the 'M' button (Mode button, typically the central button) to cycle through the pre-set inflation modes (Car, Motorcycle, Bicycle, Ball) until the desired mode is displayed.
- Preset Pressure: Use the '+' and '-' buttons to adjust the target pressure (PSI) according to your item's requirements.
- Start Inflation: Press the power button (often the 'M' button again, or a dedicated start button) to begin inflation. The device will automatically stop once the preset pressure is reached.
Using the LED Light:
Press and hold the power button for a few seconds to turn the LED light on or off. This is useful for nighttime inflation or as an emergency light.
Using as a Power Bank:
Connect your electronic device (e.g., smartphone) to the USB-A output port on the inflator using your device's charging cable. The inflator will begin charging your device.
Video 1: Demonstration of the Teffim Portable Car Air Compressor with Digital Pressure Gauge in use.
Video 2: Overview of the Teffim air compressor with Digital Pressure Gauge, highlighting its features.
5. Maintenance
- Cleaning: Wipe the device with a soft, dry cloth. Do not use liquid cleaners or immerse the device in water.
- Storage: Store the inflator and its accessories in the provided storage pouch in a cool, dry place, away from direct sunlight and extreme temperatures.
- Battery Care: To prolong battery life, charge the device fully at least once every three months, even if not in use.
6. Troubleshooting
- Device Not Turning On: Ensure the device is fully charged. If the battery is low, connect it to a power source using the USB-C cable.
- Slow Inflation/No Inflation: Check that the air hose is securely connected to both the inflator and the item's valve. Ensure the correct inflation mode and target pressure are set. Verify that the item being inflated does not have a leak.
- Inaccurate Pressure Reading: Ensure the hose is properly attached. If the issue persists, consult the manufacturer's support.
- Overheating: If the device becomes excessively hot during prolonged use, allow it to cool down before continuing operation.
7. Specifications
| Feature | Specification |
|---|---|
| Brand | Teffim |
| Model Name | CQB-3686 |
| Voltage | 5 Volts |
| Power Source | Corded Electric (for charging) |
| Noise Level | 92 Decibels |
| Special Features | Digital, LED Light, Portable |
| Item Weight | 1.55 pounds (703 Grams) |
| Material | Metal |
| Product Dimensions | 6.3"L x 2.36"W x 1.77"H |
| Air Flow Capacity | 40 Liters Per Minute |
| Motor Horsepower | 0.75 Horsepower |
| Hose Length | 300 Millimeters |
| Maximum Operating Pressure | 150 Pound per Square Inch |
| UPC | 795602942673 |
8. Warranty & Support
For warranty information and customer support, please refer to the documentation included with your product or visit the official Teffim website. Contact details for support are typically provided within the product packaging or on the manufacturer's website.





