• The business style leather case is made of high-quality material • Fine workmanship, equipped with 7-color backlit keys for convenient nighttime use • Includes a pen slot for secure storage to help prevent loss of writing tools • Comes with a Bluetooth keyboard 3.0, upward compatible with Bluetooth 5.1 devices • Keyboard can be detached from the case; strong magnetic attachment ensures stability • Bluetooth keyboard features a high-speed chip for fast pairing with Bluetooth devices in seconds • Charges via Micro USB cable; portable and ready to use after full charge Specifications: • Battery material: lithium-polymer battery • Bluetooth: BT3.0 (upward compatible with 3.0/4.0/5.0/5.1 Bluetooth devices) • Effective distance: 10 meters • Standby time: 100 days • Continuous working time: not less than 30 hours • Charging time: 2–3 hours • Lithium battery capacity: 280mAh • Lithium battery life: 2 years • Button life: 3 million clicks • Modulation method: GFSK • Working voltage: 3.0–4.2V • Working current: 4–8mA • Standby current