1. Product Overview
The Defiant 15-Amp 24-Hour Plug-In Mechanical Big Button Timer is designed to automate the operation of your electrical devices, helping to conserve energy and enhance security. This mechanical timer allows you to easily program on/off cycles for various appliances, such as lamps or seasonal lighting, by simply adjusting its pins. It is intended for indoor use only.
2. Key Features
- 24-Hour Mechanical Operation: Provides reliable daily scheduling without complex digital settings.
- Easy Programming: Features large, easy-to-press pins for setting 30-minute on/off intervals.
- Versatile Use: Ideal for controlling lamps, holiday lights, and other indoor electrical devices.
- Manual Override Switch: Allows you to temporarily turn the connected device on or off without disturbing the programmed schedule.
- Compact Plug-In Design: Plugs directly into a standard wall outlet.
- High Capacity: Rated for 15 Amps, suitable for a variety of household electronics.
3. Safety Information
Please read and understand all safety instructions before using this product. Failure to follow these instructions may result in electric shock, fire, or serious injury.
- Indoor Use Only: This timer is designed exclusively for indoor applications. Do not use it outdoors or in wet locations.
- Electrical Rating: Do not exceed the electrical rating of 15 Amps. Overloading the timer can cause overheating and fire.
- Proper Grounding: Ensure the timer is plugged into a properly grounded outlet.
- Unplug When Not in Use: Disconnect the timer from the power outlet when not in use or before cleaning.
- Keep Away from Children: Store the timer out of reach of children.
4. Package Contents
- Defiant 15-Amp 24-Hour Plug-In Mechanical Big Button Timer (Model: 49810DI)
- User Manual (this document)

Figure 4.1: The Defiant Timer as it appears in its retail packaging.
5. Setup Instructions
5.1 Setting the Current Time
- Locate the rotating dial on the front of the timer. This dial is marked with hours from 1 to 12, with both AM (day icon) and PM (moon icon) indicators.
- Rotate the dial clockwise until the current time aligns with the "TIME NOW" arrow located in the center of the dial. Ensure you set the correct AM/PM time.
5.2 Programming On/Off Times
The outer ring of the dial consists of multiple push-down pins, each representing a 30-minute interval.
- To set a period when the connected device should be ON, push down the corresponding pins for those 30-minute intervals.
- To set a period when the connected device should be OFF, leave the corresponding pins in the UP position.
- For example, if you want a device to turn on at 6:00 PM and turn off at 10:00 PM, push down all the pins from the 6 PM mark to the 10 PM mark.

Figure 5.1: Front view of the timer, highlighting the programmable dial.
5.3 Connecting the Timer
- Plug the Defiant Timer directly into a standard 120V AC wall outlet.
- Plug the electrical device you wish to control into the outlet on the bottom of the timer.

Figure 5.2: The timer in use, controlling a household appliance.
6. Operating Instructions
Once set up, the timer will automatically turn your connected device on and off according to your programmed schedule. The dial will continuously rotate, indicating the current time.
6.1 Manual Override Switch
The timer features a manual override switch, typically located on the side or bottom of the unit. This switch allows you to temporarily bypass the programmed schedule.
- Timer ON: When the switch is in this position, the timer will follow the programmed on/off cycles.
- Outlet ON: When the switch is in this position, the connected device will remain continuously ON, regardless of the pin settings.
- Outlet OFF: When the switch is in this position, the connected device will remain continuously OFF, regardless of the pin settings.
Remember to return the switch to the "Timer ON" position for the programmed schedule to resume.
7. Maintenance
The Defiant Mechanical Timer requires minimal maintenance.
- Cleaning: Wipe the timer with a soft, dry cloth. Do not use liquid cleaners or abrasive materials.
- Storage: If storing the timer for an extended period, unplug it from the outlet and keep it in a cool, dry place.
- Indoor Use: Always ensure the timer is used in dry, indoor environments.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not turn on/off at programmed times. | Incorrect pin settings. | Ensure pins are correctly pushed down for ON times and up for OFF times. |
| Device is continuously ON or OFF. | Manual override switch is engaged. | Check the manual override switch and set it to the "Timer ON" position. |
| Timer dial is not moving or time is incorrect. | No power to the timer or power interruption. | Ensure the timer is securely plugged into a live outlet. If there was a power outage, reset the current time on the dial. |
| Timer makes a faint ticking/whirring noise. | Normal mechanical operation. | This is typical for mechanical timers and does not indicate a malfunction. |
9. Specifications
| Attribute | Value |
|---|---|
| Brand | Defiant |
| Model Number | 49810DI |
| UPC | 043180498106 |
| Color | White |
| Product Dimensions (D x W x H) | 5.2"D x 6.6"W x 2.2"H |
| Number of Settings | 48 (30-minute intervals) |
| Item Weight | 4.2 ounces |
| Item Package Quantity | 1 |
| Mounting Type | Plug-In Mount |
| Batteries Required? | No |
10. Warranty and Support
For warranty information and customer support, please refer to the official Defiant website or contact their customer service directly. Keep your purchase receipt for warranty claims.





