Features: 2.4G+BT5.1+BT5.1 Wireless Transmission Technology 800-1200-1600dpi adjustment；Energy-saving, built-in storage 10M wireless receiving distance，interferences resistant ability Quiet elegant office wireless mouse;High resolution:1600DPI high resolution for fluid motion Feature to quickly return to the desktop 250Hz high rate return chip, data transmission is faster，fast positioning Specifications: Model: M103 Wireless Mouse Color: Black ,Silver Rate of return: 125HZ Movement speed: 28IPS Refreshing rate: 3000FPS Acceleration: 10G Key life: 5million times Wireless distance: 15m Work: Photoelectricity Battery capacity:500mAh（Chargeable battery） Charging cable length: 25cm Project Type: Ergonomics Optical Mouse Resolution: 800,1200,1600.(1200dpi Defaulted) Voltages / Current: 3.7V / 18mA Power Type:Rechargeable（Charging time 2h，Working time 150h） Type:2.4Ghz Rechargeable wireless mouse Buttons: 2 Buttons and 1 Round (Middle Mutton) Package Includes: 1PC 2.4 G+BT5.1+BT5.1 Wireless Mouse 1PC USB Receiver 1PC USB Charging Cable(25cm) 1PC Instruction manual note: Due to the problem of lighting effect, there might be tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.