Mini adapter, plug and play. Wireless transmission, the longest sensing distance up to 10-15 meters. Portable and weight light, very convenient to carry and store. Power switch for saving power. With 4 keys, including scroll wheel, page forward and page backward buttons for easy internet surfing. Up to 10 meters of operating distance. Type: Wireless Optical Mouse Color: Red DPI: 1200 Interface: USB 1.1/2.0 RF: 2402MHz-2480MHz RF Operation Channel: 16, Automatic Frequency Hopping Rated Voltage: 1.5V Rated Current: 12-20mA Max. Acceleration: 14ft/Sec Power Supply: 2 x AAA Batteries(Not Included) Size: 9.2cm x 6cm x 3.5cm/3.62" x 2.36" x 1.38" (Approx.) Notes: Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x 2.4GHz Wireless Optical Mouse (Batteries Not Included) 1 x USB Receiver