Product FAQ for SEENDA COE500 Pro

Getting Started & Compatibility

Compatibility

  • Bluetooth: Windows 8 to 11, macOS 10.12 or later, iPadOS 10 or later,Android 5 or higher.
  • 2.4G USB receiver: Windows only. (On a Mac, using the 2.4G receiver will give you a Windows key layout)

I didn’t receive a USB receiver. Where is it?

The USB is located on the under of mouse. There is a slot for USB. (Note: the keyboard and mouse are sharing the same USB)

Connection Issues

My keyboard/mouse won’t connect, keeps disconnecting, or isn’t recognized (Bluetooth or 2.4G USB)

①Try to fully charge the mouse/keyboard first(Green charging light means fully charged) ensure it is not in low battery mode;

②Try the corressponding re-pairing steps:

2.4G USB re-pairing steps

For the Keyboard:

Remove the USB receiver and turn on the keyboard, then briefly click the FN+Q keys to select the 2.4G channel, you will see the 2.4G channel indicator flash slowly; Then, press and hold the FN+Q keys simultaneously for 3-5 seconds, when the 2.4G channel light starts flashing quickly, it means the keyboard is in pairing mode. Quickly insert the USB receiver and bring the keyboard close to the USB port. The flashing will stop when the pairing is successful.

For the Mouse:

Remove the USB receiver and turn on the mouse and briefly press the channel selection button on the bottom of the mouse to choose the 2.4G channel. Then, hold down the left button, scroll wheel, and right button simultaneously for 5-8 seconds. Release them when you see the corresponding 2.4G channel indicator light flashing quickly, which means the mouse is in pairing mode. Quickly insert the USB receiver and bring the mouse close to the USB port. The flashing will stop when the pairing is successful.

BT re-pairing steps

For the Keyboard:

Turn on the keyboard and briefly press the FN+W/E keys to select the Bluetooth channel, you will see the bluetooth indicator flash once or flash slowly; then, press and hold the FN+W/E keys for 5 seconds again until the indicator light starts flashing quickly. After that, go to your device's Bluetooth list and find the keyboard to connect it.

For the Mouse:

Turn on the mouse, then briefly press the channel selection button on the bottom of the mouse to select the Bluetooth channel. When the corresponding channel Bluetooth indicator light starts flashing once or slowly, hold down the channel selection button again for 3-5 seconds. When you see the corresponding indicator light flashing quickly, go to your device's Bluetooth connection list and find the mouse to connect it.

③It is also recommended to try another connection if one of the channel is not working well.

My keyboard/mouse works for a few minutes, then lags or stops responding

①Please try the following steps according to the different connection channel:

For 2.4G USB connection

  • Move the device closer to the USB receiver or computer. Unplug other nearby USB receivers or wireless adapters.
  • Charge fully (green light). Low battery can cause intermittent cutouts.
  • Re‑pair using the steps above.

For Bluetooth connection:

  • If you’re on a Mac/iPad, fully charge your mac device and wait a moment after startup cause the Bluetooth system on Mac or IOS may need a few seconds to initialize fully.
  • Try to forget the previous connection history and connect again to see if this works. If possible, try to forget all other keyboard/mouse connection history on your device

②It is also recommended to fully charge the product again and try another connection channel (2.4G VS Bluetooth) if you are using Windows system.

Charging & Battery

How do I know when it’s fully charged? / The device won’t charge

For the Mouse: Light on between left button and scroll wheel – red blink = low battery, solid red = charging, solid green = full.

For the Keyboard: flash button indicator which is upside the numpad – red blink = low battery (channel lights also flash), solid red = charging, solid green = full.

If no red light appears when plugged in, or the light never turns green after 3-5 hours, try a different USB‑A to USB‑C cable and plug it directly into a computer USB port. Avoid fast‑charge wall adapters; they may not be recognized.

Keyboard/Mouse will not hold a charge/have a short battery life

①It is recommended to try another cable to fully charge the keyboard/mouse via a computer USB port and then see if the indicator will acts as it should.

For keyboard:

When the backlit is off, the abnormal usage time should be around 80 hours

When the backlit is on, the abnormal usage time should be around 15 hours

For mouse:

When the backlit is off, the abnormal usage time should be around 80 hours

When the backlit is on, the abnormal usage time should be around 20 hours

Key Issues

Some keys don’t work, type on their own, repeat, or have a delay

①Fully charge the keyboard, then re‑pair.

②For a single stuck or unresponsive key, press it firmly and hold for 5–7 seconds. This can re‑seat the internal switch or clear debris.

③If the problem is a specific key typing extra characters (e.g., pressing “P” types “89p:”), try a to connect the keyboard via another channel to see if this works.

The keyboard types the wrong characters / key input is mixed up

①Make sure your device’s keyboard language/layout is set correctly.

General Operating system settings:

On Windows, go to Settings > Time & Language > Language & Region>Switch the correct language layout.

On macOS, go to System Settings > Keyboard > Input Sources>Add the Correct Language layout(The selected logical layout is listed here.)

For iPad/Iphone: Settings - General - Keyboard - Keyboards - Add the Correct Language layout (Delete all other languages)

For Android Tablet: Settings - Language & Input - Physical Keyboard - Add the Correct Language layout - And it's best to select only language layout for the on-screen keyboard as well.

②If you’re using 2.4G on a Mac, switch to Bluetooth.

A key feels stuck or doesn’t pop back up

Press the key forcefully for 5–7 seconds. Clean around the keycap with compressed air or a gentle brush. If the keycap has come off, check for broken plastic clips – if intact, press it back down until it clicks.

A keycap fell off / is missing

We don’t sell individual keycaps. If the key still works and the clips aren’t broken, snap it back into place. If the hinge or clip is damaged, contact support with your order number and a photo for warranty options.

Backlit Issue

Backlit Operation

How to Adjust the backlit?

①For the keyboard

FN+End: Backlit On/off

FN+↑ or ↓: Backlit Brightness up on down

FN+ ← or →: Decrease/Increase Backlit Animation Speed

FN+SHIFT(right): Switching backlit modes (Lighting modes cycle in the following order: Wave (default) → Dynamic Breathing → Dynamic Flow → Single-Color Breathing → Single-Color Flow → Red Constant On → Light Green Constant On → Blue Constant On → Green Constant On → Yellow Constant On → White Constant On → Purple Constant On.)

②For the Mouse

On/Off switch button Up: RGB light on

On/Off switch button Middle: RGB light off

Left click+Forward button: RGB lighting switching (Modes cycle in the following order: Flowing (default) → Single-color Breathing → Single-color Steady → Neon → Multi-color Breathing → Gradient.)

The backlight isn’t turning on at all. What should I do?

For keyboard:

①Make sure the keyboard is fully charged (a green charging indicator means 100%).

②Press the FN and End keys once to turn on/off backlit. Use the FN+ to increase the backlit brightness and see if this works;

③Meanwhile, it is recommended to check if the single FN and END keys to see if they are separately working or not via this link: keyboardchecker.com

④If it still won’t light up, try connect the keyboard via another channel or device and try to turn on the backlit again.

For mouse:

①Fully charge the mouse via a computer USB port (charging indicator in green)

②Be sure to flip the mouse On/Off switch to the top position, this means the mouse backlit on

Only part of the keyboard lights up or the backlight flashes.

①Make sure the keyboard is fully charged.

②If it still won’t working normally, turn the keyboard on, then try to connect it via another channel or device to see if this works

The backlight color won’t change / is stuck on one color

①Make sure the keyboard/mouse is fully charged (a solid green charging light means 100%).

②If it still won’t working normally, please try the following steps:

For the keyboard: Turn on the keyboard and backlit by FN+END keys, then ress and hold the FN and SHIFT(right) and see if you can changed the backlit mode

For the mouse: Flip the on/off switch to the top first, and then press Left+Forward buttons again