Recharge indication:plug in the cable; if charging has commenced, the charging indicator light at the bottom of the mouse will remain lit. Once the mouse is fully charged, the indicator light will turn off; at the same time, the OLED screen will also indicate that the mouse has been "fully-charged". Low-battery warning:the battery icon on the screen will flash as a warning once the battery's power level drops to 30%. Status indicator lights:pick up the mouse and slide the power to "ON7", you can tell from the two different blipping indicator lights which device is currently being connected. In addition, the OLED screen will also display this information. Mouse sensitivity:Press the DPI button (button⑦) to display the four sensitivity stages:1000/1600/2400/3200 DPI. Number of buttons: 8 Motion sensor type: Optical Frequency: 2402.85MHz-2480.85MHz Wireless range: ≥10m Operating voltage/current: 3.7V20mA Mouse lifespan: about 5 million clicks Scroll wheel lifespan: about 1.2 million rotations Sensitivity stages: 1000-1600-2400-3200 DPI 2.4GHz receiver: 125Hz Bluetooth receiver:115Hz Color: Dark Gray Material: ABS Package Contents: 1 x Vertical Mouse Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.