1. Working mode: 2.4G wireless mouse 2. Battery: 1.5V common battery, more convenient to use. 3. Precise positioning: precise positioning of built-in high-end chip 4. Key: 5 million times high-end switc 5. High resolution: 1200 / 1600 / 2400 adjustable 6. Appearance design: fashionable, delicate and ultra-thin design, fashionable appearance and portable use. 7. Ergonomic design, long-term use will not fatigue, prevent mouse hand.   1. Brand / model: ywyt / g839 2: Color: Black 3: Material: ABS 4: switch life: 5 million times 5: wireless distance: 10M 6: Work: photoelectric 7: project type: ergonomic optical mouse 8: resolution: 1200 / 1600 / 2400 DPI 9: operation mode: photoelectric 10: rated voltage / current: 1.5v/7ma 11: power type: 1 * AA (1.5V common battery) 12: system requirements: Windows 98 / me / 2000 / XP / Vista / win 7 / win8 / 10 / Vista OS or latest version. 13: product weight: 55 14: project size: 100 x 63 x 38mm 15: package weight: 80g 16: package size: 110 x 90 x 70mm Package Included: 1 x mouse 1 x Manual