1. Introduction and Overview
This manual provides detailed instructions for the installation, programming, operation, and maintenance of your Avisontek Chamberlain 940EV-P2 940ESTD Wireless Universal Garage Door Opener Keypad. This keypad offers convenient and secure access to your garage without the need for a remote control.
2. Compatibility
The Avisontek Chamberlain 940EV-P2 940ESTD Wireless Universal Garage Door Opener Keypad is designed for broad compatibility with various garage door opener systems. Please review the following compatibility details:
- Main Compatibility: ONLY for Chamberlain, LiftMaster, and Sears Craftsman Garage Door Openers with a Purple, Red, Orange, Yellow, or Green Learn Button manufactured since 1993.
- NOT Supported: Security+ 3.0 White Learn Button Openers (produced in 2026) and Dip Switch Openers are NOT supported.
- Replacement For: G940EV-P2, 940EV, 940EV-P2, 940ESTD, 377LM, 977LM, 66LM, 376LM, 877LM, 877MAX, 878MAX, CMXZDCG440.

Image: Universal Compatibility Chart for Avisontek Keypad.
3. Key Features
The 940EV-P2 940ESTD Keypad is designed with user convenience and security in mind:
- Extended Battery Life: Equipped with a high-capacity 9V Alkaline battery for long-lasting usage.
- Enhanced Security: Features rolling code encryption to prevent unauthorized access and ensure property safety.
- Convenient Access: Simply enter your personalized PIN for easy and hassle-free garage door entry.
- User-Friendly Design: Includes a guest password function and a built-in night light for added convenience and safety during day and night.
- Reliable Performance: FCC certified and tested for 100,000 cycles, ensuring top-notch quality and durability.
- Weatherproof Housing: Constructed with durable, weatherproof materials to withstand various environmental conditions including sun, snow, and rain.

Image: High-Capacity Alkaline Battery and Durability Features.

Image: Industrial-Grade Chip for Enhanced Security.

Image: Weatherproof Housing and Luminous Design.
4. Setup and Installation
Follow these steps to install and program your wireless keypad:
4.1. Mounting the Keypad
The keypad is designed for effortless wireless installation. Choose a convenient location outside your garage door, ensuring it is within range of your garage door opener. Use the provided screws to securely mount the keypad to a flat surface.

Image: Effortless Wireless Installation.
4.2. Programming the Initial PIN
To program your keypad, you will need to access the 'Learn' button on your garage door opener. The location and color of this button may vary depending on your opener model (e.g., Green, Red/Orange, Purple, Yellow).
- Locate the Learn Button: Find the 'Learn' button on your garage door opener. It is typically located on the back or side panel of the motor unit.
- Press the Learn Button: Press and release the 'Learn' button on your garage door opener. The LED light next to it will illuminate or start blinking, indicating it is ready for programming. You have approximately 30 seconds to complete the next steps.
- Enter Your PIN: On the keypad, enter your desired 4-digit Personal Identification Number (PIN).
- Press ENTER: Press and hold the 'ENTER' button on the keypad until the garage door opener light clicks on and off twice. This confirms successful programming.

Image: Simple to Set Up and Sync Diagram.
4.3. Video Tutorial: Programming the Keypad
Video: Programming the Avisontek Chamberlain 940EV-P2 940ESTD Universal Keypad. This video demonstrates the steps to program your new keypad with your garage door opener.
5. Operating Instructions
Once programmed, operating your keypad is straightforward:
- Opening/Closing the Garage Door: Enter your 4-digit PIN and press the 'ENTER' button. The garage door will activate.
- Guest Password Function: The keypad supports a guest password function, allowing you to provide temporary access without sharing your primary PIN. Refer to the detailed programming instructions for setting up a guest password.
- Night Light Feature: The built-in night light illuminates the keypad for easy visibility in low-light conditions.

Image: One-Touch Operation.

Image: Day-and-Night User-Friendliness with Temporary Passwords.
6. Maintenance
6.1. Battery Replacement
The keypad uses one 9V Alkaline battery (included). When the battery is low, the keypad's backlight may dim or the keypad may become unresponsive. To replace the battery:
- Open the battery compartment cover, usually located at the bottom of the keypad.
- Remove the old 9V battery.
- Insert a new 9V Alkaline battery, ensuring correct polarity.
- Close the battery compartment cover securely.
6.2. Cleaning
To clean the keypad, use a soft, damp cloth. Avoid using abrasive cleaners or solvents, as these can damage the keypad's surface or internal components.
7. Troubleshooting
If you encounter issues with your keypad, consider the following:
- Keypad Not Responding: Check the battery. Replace it if necessary.
- Garage Door Not Activating: Ensure you are within the effective range (up to 164 feet). Re-verify your PIN. If the issue persists, try reprogramming the keypad following the steps in Section 4.2.
- Light Not Clicking Twice During Programming: This indicates that the programming was not successful. Ensure you press and hold the 'ENTER' button until the garage door opener light clicks on and off twice. Also, ensure you complete the programming steps within the 30-second window after pressing the 'Learn' button on the opener.
- Incorrect Learn Button Identification: Refer to your garage door opener's manual to correctly identify the color and location of its 'Learn' button.
8. Specifications
| Feature | Specification |
|---|---|
| Model Number | 940EV-P2 |
| Package Dimensions | 6.46 x 3.19 x 1.34 inches |
| Item Weight | 5.6 ounces |
| Batteries | 1 x 9V Alkaline battery (included) |
| Max Number of Supported Devices | 5 |
| Compatible Devices | Chamberlain, LiftMaster, Sears Craftsman (Purple, Red, Orange, Yellow, Green Learn Buttons since 1993) |
| Color | Brown |
| Manufacturer | Avisontek |
| First Available Date | February 7, 2025 |

Image: Product Parameter Overview.
9. Warranty and Support
Your Avisontek Chamberlain 940EV-P2 940ESTD Wireless Universal Garage Door Opener Keypad comes with a 12-year warranty. For any queries or support needs, please contact us through our store homepage's "Ask a question" feature or via our support email. We aim to respond within 24 hours.

Image: Avisontek Customer Support Information.