Brand: LingDu - Model: D9100 - Quantity: 1 - Color: Black - Material: ABS - Key Number: 104 - Frequency: 2.4GHz - Connection Method: Wireless - Operating range: 10m - Power Supply: 1 x AA battery - Mouse power supply by 1 x AA battery - Adjustable 1000 / 1600 dpi - OS System: Windows ME / 2000 / XP / Vista / 7 - Smart connection no need to match code plug and paly - With multiple dormancy function to save power - Mini receiver good for easy carrying - Package includes: - 1 x Wireless keyboard - 1 x Wireless mouse - 1 x USB receiver - 2 x AA batteries - 1 x Chinese user manual