By pressing the DPI-button you will change the DPI.

There is no visual indication for the DPI selection, other than that the pointer speed on the screen will be faster or slower, depending on the DPI that is selected.

We would advise to check the batteries.

And, if not already set, change the mode to ECO mode to improve the battery life

Follow the steps in the mouse settings page

К сожалению задать кнопкам другую функцию не представляется возможным, так как мышь работает со стандартным драйвером системы. Специальной программки, которая позволила бы изменения функций кнопок, в комплекте не прилагается.  

Можно посмотреть в интернете, может быть можно скачать программку для программирования кнопок

Вот например с этого сайта http://www.highrez.co.uk/downloads/XMouseButtonControl.htm

Но заметьте, что это неофициальное решение и мы не можем дать гарантии, что данное ПО вообще будет работать с данной мышью.

It's not possible to provide a replacement receiver for this product.
This is due to the fact that during production the product and receiver receive a unique code, so the product can only communicate with the bundled original receiver.

First test if the issue only persists on the laptop, and not on a desktop computer.

If the issue persists only on the laptop, we would advise to check if the mouse receives (enough) power from the laptop to function by following the steps below. Check the functoning of the mouse between each step.

1. Check the power saving option of the USB-port
   Device Manger > USB > right-click on the device > Properties > uncheck: Allow the computer to turn off this device to save power
2. Check the hardware, mouse and wireless connections
   • Connect the receiver to a different port. If possible, try the USB port at the back of the computer, since they typically have more power available.
   • Replace the battery.
   • Reestablish wireless connection by unplugging the receiver when the computer is on, then waiting for at least 10 seconds before plugging the receiver back in.
3. Disable the fast startup option. This will initialize all drivers on startup, so the time needed to start the computer might be longer.
   • Press the Windows key and X at them same time > Power Option.
   • Click Choose what the power button does.
   • Click Change settings that are currently unavailable.
   • Untick the box for Turn on fast startup (recommended) > Click Save changes to save and exit.
   • Restart the computer.

• Try using the mouse on a different surface or use a mousepad.
• Clean the sensor on the bottom of the mouse with a dry cloth.
• Improve wireless performance. See wireless troubleshooting page

Unfortunately, we do not have service centers to repair products.
A defective product should be replaced by your point of purchase during the warranty period.

We offer a 'return to retailer' warranty on our products. In case of a defect, you can return the product to your retailer with failure description, proof of purchase and all accessories. During the warranty period you will receive a replacement product from the retailer if available. For full warranty conditions you can consult: https://www.trust.com/support/warranty

This particular product has been developed for use with the Windows operating systems only.

Therefore installation instructions for other operating systems such as Mac are not available.

Nor is in fact the use of this product in any way supported with other operating systems, which don't meet our product's specifications and requirements.