1. Introduction
Thank you for choosing the Ninja Professional Plus Blender Duo with Auto-iQ. This powerful appliance is designed to simplify your blending tasks, from crushing ice to preparing nutrient extractions and smoothies. Its advanced Auto-iQ technology provides intelligent preset programs for consistent results every time.
Key features include:
- New modern design and a powerful 1400 peak watt motor.
- Ninja Total Crushing blades for perfectly crushed ice and frozen drinks.
- 72 oz. Total Crushing pitcher (64 oz. max liquid capacity) for large batches.
- Single-serve cups with spout lids for convenient on-the-go beverages.
- 3 preset Auto-iQ programs (Smoothie, Frozen Drink, Nutrient Extraction) for one-touch convenience.
2. Important Safety Information
Please read all instructions before using your Ninja Professional Plus Blender Duo. Always exercise caution when handling sharp blades. Ensure the unit is properly assembled and locked before operation. Do not immerse the motor base in water or other liquids. Keep hands and utensils out of the container while blending to reduce the risk of severe injury to persons or damage to the blender.
3. What's Included
Your Ninja Professional Plus Blender Duo package includes:
- 1400-Peak-Watt Motor Base
- 72 oz. Total Crushing Pitcher with Stacked Blade Assembly and Lid (*64 oz. max liquid capacity)
- Two 24-ounce Single-Serve Cups with Pro Extractor Blades Assembly and Spout Lids
- Recipe Inspiration Guide
- Instruction Book
- Quick Start Guide

Image: The Ninja Professional Plus Blender Duo with its main pitcher, two single-serve cups, and the motor base.
4. Setup
Before first use, wash all components (pitcher, cups, lids, blade assemblies) in warm, soapy water. Rinse thoroughly and dry. The motor base should be wiped clean with a damp cloth.
4.1 Assembling the Pitcher
- Place the motor base on a clean, dry, level surface.
- Place the 72 oz. Total Crushing Pitcher onto the motor base. Align the pitcher's handle to the right of the base. Press down firmly until it clicks into place.
- Carefully place the Stacked Blade Assembly onto the drive gear inside the pitcher.
- Add your ingredients to the pitcher. Do not fill past the MAX LIQUID line.
- Place the pitcher lid onto the pitcher, aligning the arrow on the lid with the arrow on the pitcher handle. Press down firmly until it clicks into place.
4.2 Assembling the Single-Serve Cup
- Place the motor base on a clean, dry, level surface.
- Add your ingredients to the 24-ounce Single-Serve Cup. Do not fill past the MAX LIQUID line.
- Screw the Pro Extractor Blades Assembly onto the top of the cup until a tight seal is achieved.
- Invert the cup and place it onto the motor base, twisting clockwise until it locks into place.

Image: A single-serve cup with its blade assembly, ready for attachment to the blender base.

Image: A close-up view of the Ninja blender's control panel, showing the Auto-iQ buttons and manual speed options.
Video: An unboxing and initial setup demonstration of the Ninja Professional Plus Blender Duo, highlighting its components and how to assemble them.
5. Operating Instructions
The Ninja Professional Plus Blender Duo features intuitive controls for various blending needs.
5.1 Auto-iQ Programs
Auto-iQ programs are intelligent, pre-set programs that combine unique pulsing, blending, and pausing patterns to do the work for you. Once a program is selected, it will start immediately and automatically stop when complete.
- SMOOTHIE: Ideal for fresh or frozen fruits and liquids.
- ICE CRUSH: Perfect for turning ice into snow for frozen drinks.
- EXTRACT: Designed for nutrient extractions from whole fruits and vegetables.
5.2 Manual Speed Settings
For manual control, select from the following speeds:
- LOW: For light mixing and folding.
- MED: For general blending and chopping.
- HIGH: For tougher ingredients and faster blending.
- PULSE: For controlled chopping and quick bursts of power.

Image: The Ninja blender filled with fruits and berries, ready for blending.

Image: A person pouring a freshly blended smoothie from the Ninja pitcher into multiple glasses.
Video: A demonstration of the Auto-iQ feature for making smoothies, showcasing its ease of use.
Video: This video highlights the versatility of the blender, showing how it can be used to make smoothies and even fill popsicle molds.
Video: A short clip demonstrating the blender's powerful performance for various blending tasks.
6. Maintenance and Cleaning
Proper maintenance ensures the longevity of your Ninja Professional Plus Blender Duo.
6.1 Cleaning the Pitcher and Cups
The pitcher, single-serve cups, lids, and blade assemblies are dishwasher safe. For best results, place them on the top rack of your dishwasher.
6.2 Cleaning the Motor Base
Wipe the motor base clean with a damp cloth. Do not immerse the motor base in water or any other liquid.

Image: Various parts of the Ninja blender, including the pitcher and single-serve cups, being placed into a dishwasher for cleaning.
7. Troubleshooting
- Unit does not turn on: Ensure the unit is plugged into a working outlet and the pitcher/cup is correctly assembled and locked onto the base.
- Ingredients are not blending smoothly: Add more liquid, or use the PULSE function to break down larger pieces before continuous blending.
- Motor stops during operation: The unit may have overheated. Unplug the unit, remove the container, and allow it to cool for at least 15 minutes before restarting.
8. Specifications
| Feature | Specification |
|---|---|
| Brand | Ninja |
| Model Number | BN751C |
| Power Source | Corded Electric |
| Voltage | 120V |
| Capacity | 72 Fluid Ounces (64 oz. max liquid) |
| Special Feature | Dishwasher Safe, Programmable |
| Blade Material | Stainless Steel |
| Material Type Free | BPA Free |
| Item Weight | 9.9 pounds |
| Product Dimensions | 5.12"D x 43.31"W x 59.06"H |
9. Warranty and Support
Your Ninja Professional Plus Blender Duo is covered by a 1-year limited warranty. For warranty claims, technical support, or replacement parts, please refer to the contact information provided in your Instruction Book or visit the official Ninja website.







