https://www.techpowerup.com/247421/cherry-announces-mw8-advanced-wireless-mouse
 
CHERRY presents the MW 8 ADVANCED. This brand new wireless mouse does not only offer innovative features, it is also built to meet the highest standards. The CHERRY MW 8 ADVANCED can be connected via Bluetooth or 2.4 GHz wireless. Users can simply connect the mouse to a compatible system using the built-in Bluetooth 4.0 functionality, or alternatively, use the supplied USB receiver to establish a 2.4 GHz wireless connection secured with AES encryption. Depending on the usage profile, one charge will last up to 70 days. The CHERRY MW 8 ADVANCED is available from the end of September at a suggested retail price of €50 / $60 / £44. For a wireless mouse I personally think that is a very fair price.