1. Introduction
Welcome to your new houscly ST-6663 4-in-1 Cordless Handheld Vacuum Cleaner. This versatile device is designed for efficient cleaning and utility, offering vacuuming, blowing, inflating, and deflating functions. Please read this manual thoroughly before use to ensure safe and optimal operation and to maximize the lifespan of your product.
2. Package Contents
Verify that all items listed below are included in your package:
- houscly ST-6663 Main Unit
- Crevice Nozzle
- Brush Nozzle
- Flat Nozzle (for vacuuming)
- Brush Blowing Nozzle
- Small Blowing Nozzle
- Large Inflation Nozzle
- Swim Ring Inflation Nozzle
- Metal HEPA Filter (pre-installed)
- Spare HEPA Filter
- USB-C Charging Cable
- Storage Bag
- User Manual

An image displaying the houscly ST-6663 main unit along with all its accessories: various nozzles for vacuuming, blowing, and inflating, a USB-C charging cable, two HEPA filters (one spare), and a storage bag.
3. Product Overview
Familiarize yourself with the main components of your houscly ST-6663:
- Power Button/Mode Selector: Controls power on/off and switches between suction/blower modes.
- Dust Cup: Collects debris during vacuuming.
- HEPA Filter Assembly: Filters fine dust and particles.
- Suction Port: Front opening for vacuuming and deflating.
- Blower Port: Rear opening for blowing and inflating.
- USB-C Charging Port: For recharging the device.
- LED Power Indicator: Displays charging status and current power mode.

A close-up image of the houscly ST-6663 handheld vacuum in action, demonstrating its powerful 25000Pa suction with debris being pulled into the nozzle. The image also indicates three power gears for different cleaning needs.
4. Setup
4.1 Initial Charging
Before first use, fully charge the device:
- Connect the USB-C charging cable to the device's charging port and to a compatible USB power adapter (not included).
- The built-in indicator light will show red during charging and turn green when fully charged.
- Charging time is approximately 2 hours.
4.2 Attaching Accessories
The device supports various attachments for different functions:
For Vacuuming:
- Attach the desired vacuum nozzle (e.g., crevice tool, brush nozzle, flat nozzle) to the suction port at the front of the main unit.
For Blowing/Inflating/Deflating:
- Remove the dust cup assembly from the main unit.
- Attach the appropriate blowing or inflation/deflation nozzle to the blower port at the rear of the main unit.

A composite image illustrating the four main functions of the houscly ST-6663: vacuuming car interiors, blowing dust from surfaces, inflating a swim ring, and deflating a storage bag. Various nozzles are shown in use for each function.
Video demonstrating the assembly and use of various attachments for the houscly ST-6663, including vacuuming and blowing functions.
5. Operating Instructions
5.1 Power On/Off and Mode Selection
- To power on, press and hold the power button for 2 seconds. The device will start in Eco Mode (lowest suction/blower speed).
- Press the power button again to cycle through modes: Standard Mode, High Speed Mode.
- To power off, press and hold the power button for 2 seconds from any mode.
5.2 Vacuuming Mode
- Ensure the desired vacuum nozzle is attached to the suction port.
- Select the appropriate power mode for the cleaning task.
- Move the nozzle over the surface to be cleaned, ensuring proper contact for effective suction.
5.3 Blowing Mode
- Ensure the appropriate blowing nozzle is attached to the blower port.
- Select the desired power mode.
- Direct the airflow to clear dust, debris, or dry surfaces.
5.4 Inflating Mode
- Attach the correct inflation nozzle to the blower port.
- Insert the nozzle into the inflation valve of the item (e.g., swim ring, air mattress).
- Power on the device and select the desired speed to inflate.
5.5 Deflating Mode
- Attach the appropriate deflation nozzle to the suction port.
- Insert the nozzle into the deflation valve of the item (e.g., vacuum storage bag).
- Power on the device to extract air.
Video demonstrating the practical application of the houscly ST-6663 in various modes, including vacuuming car interiors, blowing dust, and inflating/deflating items.
6. Maintenance
6.1 Dust Disposal
- To empty the dust cup, press the one-touch release button located on the dust cup assembly.
- Dispose of collected debris into a waste bin.
- Close the dust cup securely until it clicks.
6.2 Filter Cleaning and Replacement
- Twist the dust cup assembly counter-clockwise to detach it from the main unit.
- Remove the HEPA filter from the dust cup.
- Tap the filter gently to remove loose dust. For thorough cleaning, rinse the HEPA filter under running water.
- Ensure the filter is completely dry before reinserting it into the dust cup.
- Replace the HEPA filter every 3-6 months, or as needed, to maintain optimal performance. A spare filter is included.

A composite image detailing the maintenance aspects of the houscly ST-6663. It shows the dual-layer metal HEPA filter, the one-press dust disposal mechanism, and the filter being rinsed under water, emphasizing its washable and durable design.