Universal 2.4G Wireless Receiver USB Adapter For Computer Mouse Keyboard Connect and Color:Black,WhiteSize(approx.):1.71.2cm Material:alloy ,plasticNotice:1. Please allow 13mm error due to manual measurement.Please make sure you do not mind before you bid.a2. The colors may have difference as the difference of display, please understand.Package:1 x USB Receiver for Wireless Gaming Mouse Note :There is 23% difference according to manual measurement. please check the measurement chart carefully before you buy the item. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you in EU and US quality standardconverse : 1 inch = 2.54cm or 1cm = 0.393 inchNOTE: the product in the picture maybe larger than actual one,Please check the size before Bidding