Features: 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 long?lasting 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 Combo Material: ABS,Iron Plate Keyboard: Data Line Interface: USB Built in Battery: Lithium ion Battery Battery Capacity: 180mAh Battery Model: YN803040 Limited Range of Operation: Within 10 Meters Connection Method: BT Mouse: Style: Single BT Battery (Delivery Without Receiver) Number of Keys: 4 Keys DPI: 800,1200,1600 Connection Method: BT Use Battery: 1 x AA Battery(Shipped Without Battery) PackageList:1 x Keyboard 1 x USB Data Cable 1 x Mouse 1 x Chinese English and Japanese User Manual (Mouse) NoteKeyboard with built in battery, mouse shipped without battery.