【Detachable Bluetooth-compatible Keyboard】This protective set includes a PU leather+TPU case, and a wireless Bluetooth-compatible keyboard. Ultra-thin and portable, which is very suitable for traveling and business trips 【Built-in Touchpad】With a built-in touchpad function, it will offer a great aid when you do not have a mouse in hand 【With Stand】The stand case makes it much more comfortable for typing, watching videos, Internet surfing, and reading while keeping both your hands free & avoids any joint pain 【Pen Holder】With a pen holder loop for stylus storage, no need to be afraid of losing your stylus pen (stylus is not included) 【Fully Protection】High-quality material combined with excellent workmanship. Fully protects your device against shock, abrasion, scratch, fingerprint, dirt, etc. Specifications: Bluetooth-compatible version: 3.0 Effective operating distance: 10 meters Modulation mode: GFSK Working voltage: 3.0-4.2V Working current: ＜2.5mA Standby current: ＜0.3mA Sleep current: ＜40uA Charging current: ＞200mA Standby time: ＞100 days Charging time: 3-4 hours Lithium battery capacity: 150mAh Sustainable working time: 100 hours Lithium battery life: 3 years Key force: 80±10g Key life: 5 million clicks Working temperature: -10 to +55℃ Charging port: Type-C