Applicable system: The keyboard size is specially designed for Surface Pro. The keyboard supports all Windows systems. You can also use this keyboard to pair with other electronic devices with Bluetooth and Windows systems, but note that the magnetic attachment is only compatible with Surface Pro devices. Make Surface Pro3, Surface Pro4, Surface Pro5, Surface Pro6, and Surface Pro7 function like a laptop: The keyboard attaches physically to the Surface Pro via magnetic connection and pairs through Bluetooth. After Bluetooth pairing, use mechanical keys and a large trackpad for a laptop-like experience. (This keyboard is not compatible with Surface Go.) Slim and compact design with full-size keyboard performance. Features functional media keys and a large presspad for easy control. Keyboard includes 7-color backlighting with night light effect. Charges in 2 hours and provides up to 95 hours of continuous use. Product Name: Wireless Bluetooth Keyboard. Compatible models: Surface Pro3, Surface Pro4, Surface Pro5, Surface Pro6, Surface Pro7. Usage instructions: 1. Turn on the Bluetooth keyboard by switching the power switch in the lower right corner from OFF to ON. The keyboard powers on and the blue light illuminates after 3 seconds. 2. Press the [Link] or [Connect] button next to the switch; the blue light stays on and the Bluetooth indicator begins flashing. 3. Turn on your tablet, go to Settings > Network & Internet > Bluetooth, enable Bluetooth, search for nearby devices, locate the Bluetooth name of the keyboard case, and select Connect. 4. When the tablet displays a Bluetooth pairing request prompting for a passcode, enter the code shown on the screen using the keyboard and press Enter to complete pairing. Features: Mechanical keys and extra-large trackpad enhance typing, navigation, and control on Surface Pro. Bluetooth technology with reliable wireless connectivity. ABS keycaps with PU leather finish for a premium look and feel. Fn key supports multimedia functions. 7-color backlighting with adjustable night light effect. Designed specifically for Surface Pro3, Pro4, Pro5, Pro6, and Pro7. Supports all Windows operating systems. Compatible with Bluetooth 3.0, 4.0, and 1.1 protocols. Charging via USB interface. Built-in lithium battery with 450mAh capacity. Operating temperature: -10°C to +55°C. Charging time: 2–3 hours. Usage time: up to 95 hours. Standby time: up to 60 days. Keystroke lifespan: 500 million cycles. Bluetooth operating range: up to 10 meters. Color: Black. Material: PU + ABS. Dimensions: 29.5 x 22 x 0.5 cm. Package includes: 1 x Wireless Bluetooth Keyboard with Trackpad, 1 x USB Charging Cable, 1 x User Manual. Additional items not included. Note: Lighting and display differences may cause slight color variations between the image and the actual product. Measurement tolerance: ±1–3 cm.