Feature:1. Long Lasting Standby: The data cable of the keyboard is a USB interface, which is environmentally friendly and durable, can be recharged repeatedly, and has a built in rechargeable battery for longlasting battery life.2. 1600DPI: Wireless mouse three levels adjustment DPI, 800, 1200, 1600, and ultra thin and ultra quiet, ergonomic design, comfortable feel, 4D keys, more comfortable to use.3. 12 Fn Keys: Silent keyboard has 12 Fn composite keys, a combination of Fn+F1~F12, which supports common shortcut key functions such as volume, media, mute, and song cutting.4. Wireless Connection: The keyboard supports BT mode connection, and is compatible with mobile phones, computers, and tablet devices, and can be freely matched with forWindows,for OS X,for Android, etc.5. Good Rebound Effect: The keyboard keys are designed with a scissor foot structure, which is comfortable to tap, has a good rebound effect, feels comfortable, and is clear and powerful when typing.Specification:Item Type: Keyboard Mouse ComboMaterial: ABS,Iron PlateKeyboard:Data Line Interface: USBBuilt in Battery: Lithium ion BatteryBattery Capacity: 180mAhBattery Model: YN803040Limited Range of Operation: Within 10 MetersConnection Method: BTMouse:Style: Single BT Battery (Delivery Without Receiver)Number of Keys: 4 KeysDPI: 800,1200,1600Connection Method: BTUse Battery: 1 x AA Battery(Shipped Without Battery).Package List:1 x Keyboard1 x USB Data Cable1 x Mouse1 x Chinese English and Japanese User Manual (Mouse)Note:Keyboard with built in battery, mouse shipped without battery.