1. Introduction
This manual provides comprehensive instructions for the Smartby NS-RC4NA-18 remote control, designed as a direct replacement for various Insignia TV models. This remote requires no programming and is ready for use immediately after battery installation.
Compatible Insignia TV Models include: NS19D220MX16A, NS19D220NA16A, NS19D310NA19, NS24D310NA19, NS32D220NA18, NS39D310NA17, NS40D420MX18, NS40D420NA18, NS49D420NA18, NS50D510MX17, NS50D510MX19, NS50D510NA17, NS50D510NA19, NS55D420MX18, NS55D420NA18, NS55D510NA19.
2. Setup: Battery Installation
The NS-RC4NA-18 remote control operates on two (2) AAA alkaline batteries. Batteries are not included with the remote and must be purchased separately.
- Locate the battery compartment on the back of the remote control.
- Press down on the latch and slide the battery cover downwards to open.
- Insert two (2) AAA batteries, ensuring the positive (+) and negative (-) terminals align correctly with the indicators inside the compartment.
- Slide the battery cover back into place until it clicks securely.
No programming or pairing is required for this remote control. It is ready for immediate use with compatible Insignia TVs once batteries are installed.

Figure 2.1: Front view of the NS-RC4NA-18 remote control. The battery compartment is located on the reverse side.
3. Operating Instructions
The NS-RC4NA-18 remote control provides full functionality for your compatible Insignia TV. Below is a guide to the primary buttons and their functions:
| Button | Function |
|---|---|
| Power (⏻) | Turns the TV on or off. |
| INPUT | Cycles through available input sources (HDMI, AV, Component, etc.). |
| Number Pad (0-9) | Directly enters channel numbers. |
| MENU | Opens the TV's main menu for settings and options. |
| Navigation Arrows (▲ ▼ ◄ ►) | Navigates through menu options and channel lists. |
| ENTER | Confirms selections in menus. |
| EXIT | Exits the current menu or on-screen display. |
| INFO* | Displays information about the current program or input. |
| FAVORITE | Accesses favorite channels list. |
| ACC | Accesses audio description or accessibility features. |
| CC | Toggles Closed Captions on or off. |
| VOL +/- | Adjusts the volume level up or down. |
| MUTE | Mutes or unmutes the TV audio. |
| CH ▲ ▼ | Changes the channel up or down. |
| SLEEP | Sets a sleep timer for the TV. |
| ASPECT | Changes the screen aspect ratio. |
| GAME | Activates or deactivates game mode. |
| PICTURE | Accesses picture settings. |
| AUDIO | Accesses audio settings or changes audio tracks. |
| Media Controls (▶ ⏸ ■ ⏪ ⏩ ⏮) | Controls playback of media (Play, Pause, Stop, Rewind, Fast Forward, Skip Back, Skip Forward). |
Ensure there is a clear line of sight between the remote control and the TV's infrared sensor for optimal performance.
4. Maintenance
- Cleaning: Use a soft, dry cloth to clean the remote control. Do not use liquid cleaners or abrasive materials, as they may damage the surface or internal components.
- Battery Replacement: Replace batteries when the remote's response becomes sluggish or stops working. Always replace both batteries at the same time with new AAA alkaline batteries.
- Storage: If the remote will not be used for an extended period, remove the batteries to prevent leakage and potential damage to the remote. Store in a cool, dry place.
- Avoid Extreme Conditions: Do not expose the remote to extreme temperatures, direct sunlight, or high humidity.
5. Troubleshooting
| Problem | Possible Cause / Solution |
|---|---|
| Remote is not working at all. |
|
| Some buttons are not responding. |
|
| Remote works intermittently. |
|
6. Specifications
- Model: Smartby NS-RC4NA-18
- Product Dimensions: 7 x 2 x 0.7 inches
- Item Weight: 2.4 ounces
- Power Supply: 2 x AAA Alkaline Batteries (not included)
- Connectivity Technology: Infrared (IR)
- Compatible Devices: Insignia Televisions (specific models listed in Introduction)
- Special Feature: Ergonomic design
7. Warranty and Support
For information regarding warranty coverage, returns, or technical support for your Smartby NS-RC4NA-18 remote control, please refer to the original purchase documentation or contact the seller directly. Specific warranty terms may vary by retailer and region.
For general product inquiries, you may visit the Smartby Store on Amazon.