MiraCase Comfortable 2.4 GHz Long Range Wireless Mouse | 1600 DPI | 15M Working Distance | Battery Included | Black 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 Test Environment. 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 -- The concealed USB Receiver (USB Transmitter) is easy to be kept which could be inserted into the back of the mouse, or be kept in the USB interface of the computer all the time, and will never be lost when you don't use it 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