Ergonomic Design Mouse -- The shape of this Bluetooth Mouse keeps your hand in the right ergonomic position, end of wrist & shoulder pain 1 Mouse for Multi-purpose -- Connects up to 3 devices via Bluetooth 5.0 + Bluetooth 3.0 + 2.4G wirele, 1 click for switch from the devices easily Noisele Click & Voiced Click -- Equipped with 9 buttons(not programable), featuring with noisele click & voiced click left/right button to meet your different needs for working or gaming Rechargeable Mouse -- With built-in rechargeable battery which means you can use this mouse without running the risk of not having a couple of batteries at hand Wide Compatibility -- Bluetooth and 2.4G wirele connectivity make this mouse supports almost all Bluetooth-enabled devices or the devices with USB ports Ergonomic Vertical Mouse 1 Mouse for Multi-purpose This mouse connects to 3 devices via Bluetooth 5.0 + Bluetooth 3.0 + 2.4G USB receiver simultaneously, the switch button is just near your thumb for switching between3 devices easily, with conspicuous lights on the top of the mouse to let you know which connection mode you are using Vertical Ergonomic Design Mouse Lets try this vertical one if you tired of using the traditional grip, the shape of this Bluetooth Mouse keeps your hand in the right ergonomic position, end of wrist & shoulder pain. User Friendly Vertical Mouse Page forward and back buttons enable you to operate faster and more efficiently, the mode switch button on the buttom let you can switch from your computers easily by a simple click (PLS KINDLY NOTE "forward & backward" function is not available for Mac OS) Rechargeable Ergonomical Mouse With built-in rechargeable battery which means you can use this mouse without running the risk of not having a couple of batteries at hand With Voiced & Noisele Left/right Button Featuring with noisele click & voiced click for left/right button to meet your different needs, you can choose the noisele one which wont bother others, while you can also choose the Voiced one to enjoy the "Click"