MCHOSE L7 ULTRA Blue Super Lightweight Wireless Gaming Mouse 39g Pixart 3950 Sensor 8k Dongle Included Purchased about two weeks ago and used for 3 days, about 30 minutes a day. There were no operational problems, and I was able to use it properly at 8000hz. I am selling it due to financial reasons. There are no noticeable scratches or stains. *Please note that scratches on the mouse feet are considered wear and tear. This is a used item that has been in the hands of an individual, so please purchase only if you understand this.