1. Material: ABS2. Size: 115 * 71 * 39mm Weight: 90g3. Scheme: YiCHiP. Chip: Original phase 30654. Link method: 2.4G+Bluetooth dual-mode5. Battery capacity: 400mAh Charging time: 2 hours Usage time: 7 days6. DPI value: 800/1200/1600 (same CPI value)7. Number of buttons: 7 (with page flipping function)