Customer Ratings & Reviews

Hi 12234, thank you for your feedback! You should not experience any lag with any Logitech product. For support, please refer to: https://support.logi.com/hc/en-us/articles/360023459773 - Will, Logitech.

Hi Manny, Very sorry to hear about the connection issues that you're having with the MK540 Wireless Keyboard and Mouse. There are several reasons why connection can be lost: low batteries, moving the Unifying Receiver from one USB port to another, moving the receiver to another computer, plugging the receiver into a USB hub or other unsupported device such as a KVM switch (your USB receiver must be plugged directly to your computer), using your mouse/keyboard on metal surfaces, radio frequency (RF) interference of more powerful wireless devices (wireless speakers, computer power supplies, monitors, cell phones, garage door openers). Be sure to keep those devices at least 8 inches away from the receiver. If none of those solutions work, then there could be a hardware issue which should be covered by the 1 year limited hardware warranty. Here's a link to File A Claim:  https://support.logi.com/hc/en-us/articles/360024924974-Warranty-MK540-ADVANCED. Hope that you found this useful and that all is going well. - Richard from Logitech

Hi Brandon, thank you for sharing your experience with the MK540. I'm sorry that your experience with the mouse was inaccurate and had lag. In some instances the placement on the USB receiver can impact the performance of the mouse. If possible you can change the port that the USB is in or get a USB extender so that there is line of sight between the mouse and the USB. I'm sorry that the keyboard didn't live up to your standards either. I hope you are able to find a mouse and keyboard that better suits your needs. Thank you for being a Logitech customer. Kristi from Logitech

Hey there Gigi, I'm sorry to hear that you had some issues with your MK540. In the future, if you have this issue again, I would recommend trying a different USB port for the dongle, one closer to your devices and with as few obstacles as possible, and switch out the batteries for fresh ones. -Weston from Logitech

That sounds like an issue. In order to help you effectively, please provide your information to our support team by emailing socialcare@logitech.com. Name – Email address – Country – Product name – Brief description of the issue –

Thank you for your feedback! For support, please refer to: https://support.logi.com/hc/en-us/articles/360023459773 - Will, Logitech.

Hi John G,
Thank you for your feedback. It is greatly appreciated. Sorry for any inconvenience. If you ever need assistance, please contact Logitech Support on the website.
LaShonda from Logitech

Hello, I am so sorry to hear to hear this combo is too loud for you. Here are some keyboard options with quiet keys: https://www.logitech.com/en-us/products/keyboards.html?filters=quiet-keys. I hope this helps! Thank you for taking the time to write this review, we appreciate the feedback. I hope you have a great day!
-Danielle from Logitech

Hi James, we're sorry to see you're having some connectivity related issues with your MK540 Combo. If you're looking for something more reliable for gaming, check out the Logitech G website! there you'll find a bunch of options that are made specifically for a lag free gaming experience such as the G915 keyboard and G502 Wireless mouse. Hope that helps.

Hello, I am sorry to hear you were unable to locate the USB dongle. Fortunately, this combo comes with a 1 year warranty through Logitech so we can get you a replacement USB dongle. Simple just file a claim here: https://support.logi.com/hc/en-us/articles/360024924974-Warranty-MK540-ADVANCED. I hope this was helpful. Thank you for taking the time to write this review, we appreciate the feedback.

We're sorry you're going through this. In order to help you effectively, please provide your information to our support team by emailing socialcare@logitech.com. Name – Email address – Country – Product name – Brief description of the issue –

Hello VerDisappointed! Sorry to hear you were sold the wrong mouse and keyboard kit for your MacBook by mistake. We hope you'll find the right solution among our other products! Simply visit our support page if we can be of any help: https://support.logi.com/hc/en-us - Mathieu from Logitech

Hello, Jesse! I'm sorry to hear that the mouse on your MK540 combo wasn't functioning out of the box. Thank you so much for leaving this review! - Maggie from Logitech

HI Lynn,
Thank you for your feedback. It is greatly appreciated. Sorry for any inconvenience . If you ever need assistance, please contact Logitech Support on the website.
LaShonda from Logitech