Bluetooth version 2.1 +EDR wireless technology High-precision laser tracking system 1600/ 800 DPI Adustable Internet back & forward buttons Smart low-power & sensitivity indicator Bluetooth Version 2.1 +EDR Wireless Technology Bluetooth 2.1 +EDR wireless technology supports adaptive frequency hopping, & its 79 channels allow faster, more stable connection, & a satisfying working range up to 10 meters. GIGABYTE Accurate Laser Tracking System Equipped with GIGABYTE accurate laser tracking system, the mouse is so responsive & easy to control. When you are using the mouse, you will find it as smooth as it is engaging. 800/1600 On-the-fly DPI Adjustable You may adjust DPI sensitivity anytime you want to by simply clicking DPI-adjusting button on the mouse. Internet Backward & Forward buttons The side buttons near your thumb are the internet backward & forward keys. Use these keys when browsing web pages, & feel the convenience brought by them! Stylish Design & Comfortable Grip M7700B stays true to one of GIGABYTE’s core concepts – ergonomic design. The mouse is designed exclusively for right-hand users. Rubber grip topped it off with the extraordinary h&-feeling, that is already more than satisfying to users. Low-Power Indicator When the battery is low, the low-power indicator would blink for 5 seconds, & then turn off. Interface Blue tooth Tracking System Laser Sensitivity 800/ 1600 DPI DPI Switch YES Scrolling Std Vertical Side Buttons 2 Dimension (L) 100x (W) 60x (H) 37 mm Weight 68g (excluding batteries) Transmission Distance 10M (in open site) Battery Life 5 months Color Noble Black Packing Content mouse, AAA x 2pcs Software SIM OS Support Windows XP 32bit/ Vista/ Win 7/ Win 8 Certificate CE, FCC Warranty 2 Years