UPGRADE FUNCTION-RECHARGEABLE & POWER INDICATORBuilt-in 700mAh large-capacity rechargeable Lithium polymer battery, which can be used for several months after a single charge. This wireless computer mouse is equipped with 3 power indicator lights, and the battery meter design can clearly display the power source, saying goodbye to power failure SILENT CLICK (left and right button)Silent clicking laptop mouse for left and right button fits the circumstance for using the mouse in public, such as library, dormitory, office, and so on, and apart from blue light indication during recharging and light off after full recharge, this design results worry-free for disturbing others TRI-MODE CONNECTIONInphic Bluetooth 5.0/4.0 and 2.4G USB connection. You can switch to any mode by clicking the mode switch button located at the bottom of the mouse. The indication lights of Bluetooth 5.0, Bluetooth 4.0 and 2.4G USB are green, blue and red, respectively. Once you