★ SAVE POWER & LONG BATTERY LIFE-- Up to 36 months of battery life for its newest low-power technology and industry top chip, saving power 5 times than normal ones. Say goodbye to the troubles of replacing battery frequently ★ 2.4 G & 1600 DPI -- With 2.4 G wireless technique, it could to be connected within 15 meters/ 49 ft in our Test Environment. Please try to keep the least obstacles between the mouse and the USB transmitter if you intend to use it by a long distance. Precise optical engine with 1600 DPI tracking positioning could provide you wonderful and amazing experience ★ COMFORTABLE ALL-DAY-LONG -- Symmetric design allows to use by right hand, as well as left one. Ergonomic design makes you feel extremely comfortable, especially for long-time use. With comfortable contour design, your wrist will never not be fatigue or painful any more ★ TINY USB RECEIVER -- Be hidden in the bottom of the mouse (when you get the product), the USB Transmitter could be kept in the USB interface of your computer all the time, or be inserted into the bottom of the mouse when you won’t use it for a long time ★ 3 INTELLIGENT SLEEP MODES -- It will be in sleep mode automatically without moving within 5 minutes, and will be active by moving the mouse or clicking mouse button | 100% MONEY BACK GUARANTEE - Love It or Your Money Back, Your Purchase Is Risk-free with No Questions Asked