Features: brand new and high quality Rechargeable: Built-in rechargeable battery. Accurate tracking: Professional IC positioning accuracy. 10M wireless receiving distance, Third gear DPI adjustment design. Silence key: 5 million silent designs, more suitable for office use. High resolution: Max 1600 DPI high resolution for fluid motion. Metal sump design, high-end wireless mouse, stylish, easy to carry. Three-level power saving mode: 1): 3 seconds into the first sleep that light flashing continuously; 2): 1 minute or so to enter the secondary sleep that intermittent flashing lights; 3): 8 minutes or so, go to level 3 sleep, the light goes out. Specifications: Material: ABS Color: Black, Pink (optional) Operation Mode: Opto-electronic Type: 2.4 GHz Wireless Power Type:Rechargeable Number of keys: 4 keys for Key Life: 5 Million Times (Mute switch) Wireless Distance: 10m Battery Capacity: 500mAh（Rechargeable） Resolution: 1600dpi Rated Voltage / Current: 3.7V / 8mA Product Size: approx. 110x65x35mm/ 4.33x2.56x1.38in Package Includes: 1x Rechargeable Wireless Mouse 1x USB Receiver 1x USB Charge Cable(80CM) 1x Instruction Manual note: Due to the lighting effects and shooting angles, there is color difference in the product, please understand. Due to manual measurement, there is a tolerance in the product size.