1. Introduction
Thank you for choosing the KECOOLKE SU-787B 2.5L Ultrasonic Jewelry Cleaner. This device utilizes advanced ultrasonic technology to provide thorough and efficient cleaning for a variety of items, including jewelry, eyeglasses, watches, and small parts. Please read this manual carefully before operation to ensure safe and optimal performance of your cleaner.

Image 1.1: KECOOLKE SU-787B Ultrasonic Jewelry Cleaner. This image displays the main unit of the ultrasonic cleaner with its transparent lid and control panel, surrounded by various small items like nuts, bolts, and rings, indicating its cleaning versatility.
2. Safety Instructions
- Read all instructions before using the appliance.
- Do not immerse the main unit in water or other liquids.
- Ensure the power cord is not damaged and is properly connected to a grounded outlet.
- Do not operate the cleaner without liquid in the tank.
- Keep out of reach of children.
- Unplug the unit from the power outlet when not in use or before cleaning.
- Do not disassemble the unit. Contact qualified service personnel for repairs.
- Avoid cleaning items that may be damaged by ultrasonic vibrations, such as certain types of pearls, opals, emeralds, or glued items. Consult a jeweler if unsure.
- Use only water or recommended cleaning solutions. Do not use flammable, corrosive, or abrasive liquids.
3. Product Overview
3.1 Components
- Main Unit with Stainless Steel Tank
- Transparent Lid
- Control Panel (DEFOAM, HEAT, TIME, START/STOP buttons)
- Cleaning Basket
- Power Cord

Image 3.1: Included Accessories. This image shows the ultrasonic cleaner unit, its transparent lid, and the white cleaning basket, along with various items like sunglasses, rings, a wrench, and small metal parts, illustrating the comprehensive set of accessories and items that can be cleaned.
3.2 Key Features
- Large Capacity: 2.5 Liters stainless steel tank.
- Powerful Ultrasonic Cleaning: 42,000 Hz ultrasonic vibrations for deep cleaning.
- Dual Transducers: 160 Watts of power for effective cleaning.
- Degas Function: Removes dissolved gases from the cleaning solution for enhanced ultrasonic action.
- Heating Function: Warms the cleaning solution to improve cleaning efficiency.
- Adjustable Timer: Five preset cleaning cycles (90s, 180s, 280s, 380s, 480s).
- Low Noise Operation: Designed for quiet use.

Image 3.2: Advanced Transducer Technology. This graphic illustrates the internal workings of the ultrasonic cleaner, highlighting the five powerful transducers at the bottom of the tank, generating 42,000 Hz ultrasonic vibrations with 160W power, and indicating a 2.5L capacity.

Image 3.3: Sonic Cleaner Features. This image shows the top view of the ultrasonic cleaner in operation, with bubbles indicating ultrasonic activity. Icons around it highlight key features: 360° all-round deep cleaning, low noise operation, dual sensors, built-in heater, and five timer modes (180s, 280s, 380s, 480s, 90s).
4. Setup
- Unpack: Carefully remove the ultrasonic cleaner and all accessories from the packaging. Retain packaging for future storage or transport.
- Placement: Place the unit on a firm, flat, and dry surface. Ensure there is adequate ventilation around the unit.
- Fill Tank: Open the lid and fill the stainless steel tank with water or an appropriate ultrasonic cleaning solution. Do not exceed the maximum fill line. Ensure the items to be cleaned will be fully submerged.
- Insert Basket: Place the cleaning basket into the tank.
- Place Items: Carefully place the items to be cleaned into the cleaning basket. Avoid overcrowding the basket to ensure effective cleaning.
- Close Lid: Close the transparent lid securely.
- Connect Power: Plug the power cord into a grounded electrical outlet. The unit will enter standby mode.
5. Operating Instructions
5.1 Basic Cleaning
- After setup, press the TIME button repeatedly to select the desired cleaning cycle. Available times are 90s, 180s, 280s, 380s, and 480s. The selected time will be displayed.
- Press the START/STOP button to begin the cleaning cycle. The ultrasonic vibrations will start.
- The unit will automatically stop when the selected time elapses.
- To stop cleaning mid-cycle, press the START/STOP button again.
- Once cleaning is complete, unplug the unit, open the lid, and carefully remove the cleaning basket with the cleaned items.
- Rinse the cleaned items under clean water and dry them thoroughly with a soft cloth.
5.2 Degas Function
The Degas function removes dissolved gases from the cleaning solution, which can interfere with ultrasonic cavitation, thereby improving cleaning efficiency. It is recommended to use the Degas function for a few minutes before starting a cleaning cycle, especially with fresh tap water.
- With the unit in standby, press the DEFOAM button. The degas cycle will begin.
- Allow the degas cycle to run for approximately 2-5 minutes.
- Press DEFOAM again to stop, or proceed to select a cleaning time.
5.3 Heating Function
Heating the cleaning solution can enhance the cleaning power, particularly for items with stubborn dirt or grease. The heater will warm the solution to an optimal temperature.
- With the unit in standby, press the HEAT button. The heating indicator will illuminate.
- Allow sufficient time for the solution to warm up. The heating process can be run concurrently with a cleaning cycle or independently.
- Press HEAT again to turn off the heating function.

Image 5.1: Cleaning Applications. This image displays the ultrasonic cleaner with a watch inside, surrounded by icons representing various items that can be cleaned, such as rings, necklaces, dentures, earrings, glasses, razors, parts, watches, combs, and brushes, emphasizing its versatility.
6. Maintenance and Care
- Draining the Tank: After each use, especially if using cleaning solutions, unplug the unit and carefully drain the liquid from the tank.
- Cleaning the Tank: Wipe the inside of the stainless steel tank with a soft cloth. Do not use abrasive cleaners or scrubbers.
- Exterior Cleaning: Wipe the exterior of the unit with a soft, damp cloth. Do not use harsh chemicals.
- Storage: Store the unit in a cool, dry place with the lid slightly ajar to allow for air circulation.
- Water Quality: For optimal performance and longevity, consider using distilled or deionized water, especially in areas with hard water.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit does not power on. | No power supply. | Check if the power cord is securely plugged into a working outlet. |
| Ultrasonic cleaning is weak or ineffective. |
|
|
| Heating function not working. | Heating function not activated. | Press the HEAT button to activate. Allow time for the solution to warm. |
| Unit stops unexpectedly. | Cleaning cycle completed or unit overheated. | If cycle completed, this is normal. If not, unplug and allow to cool for 30 minutes before restarting. Ensure proper ventilation. |
8. Specifications
| Brand | KECOOLKE |
| Model Name | SU-787B |
| Capacity | 2.5 Liters |
| Ultrasonic Frequency | 42,000 Hz |
| Ultrasonic Power | 160 Watts (Double Transducers) |
| Product Dimensions | 13"L x 9"W x 10"H |
| Item Weight | 4.4 pounds |
| Power Source | Corded Electric |
| Included Components | Cleaning basket |
| UPC | 717020698987 |
9. Warranty and Support
For warranty information and customer support, please refer to the documentation included with your purchase or contact the seller directly. KECOOLKE is committed to providing quality products and assistance.
Manufacturer: Foshan Lifecode Electronic Tech.Co.,Ltd.