PLS RECHARGE THE MOUSE WITH THE CABLE INCLUDED IN PACKAGE. CONNECT BY BLUETOOTH AND 2.4G USB RECEIVER (RECEIVER INSERTED ON BACK OF THE MOUSE) 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 wireless, 1 click for switch from the devices easily Noiseless Click & Voiced Click -- Equipped with 9 buttons(not programable), featuring with noiseless 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 wireless connectivity make this mouse supports almost all Bluetooth-enabled devices or the devices with USB ports((PLS KINDLY NOTE: "Forward & Backward" function is not supported by Mac OS)